Keyboards / Compare

Keychron K2 Ultra 8K vs NuPhy Air75 V3

A

Product A: Keychron

K2 Ultra 8K

90 of 164 known

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B

Product B: NuPhy

Air75 V3

96 of 164 known

Change NuPhy Air75 V3

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All 164 fields

Every value links to where we found it.

Only differences

AKeychron K2 Ultra 8K

BNuPhy Air75 V3

General

5 of 9 differ

Series

K Ultra2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026The page lists the keyboard under the K Ultra series.

Air V31Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page names the Air V3 series: Air 65 V3, Air 75 V3 and Air 100 V3.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

K2U-J1, K2U-J3, K2U-J41Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 2026Global/US store variants: K2U-J1 Fully Assembled Black Apex Red, K2U-J3 Brown, K2U-J4 Banana. Regional ISO and other layouts are not included.

Keyboard Air75 V3(White/Red Nano)-ANSI, Keyboard Air75 V3(White/Brown Nano)-ANSI, Keyboard Air75 V3(White/Blush Nano)-ANSI, Keyboard Air75 V3(Dark/Red Nano)-ANSI, Keyboard Air75 V3(Dark/Brown Nano)-ANSI, Keyboard Air75 V3(Dark/Blush Nano)-ANSI2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 2026Same product on NuPhy's checkout domain. The six ANSI SKUs are Keyboard Air75 V3(White or Dark / Blush, Red or Brown Nano)-ANSI. JIS, DE, UK and FR SKUs are not stored.

GTIN / EAN

4894979058003, 4894979058010, 48949790580271Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 2026Barcodes of the three variants in the product data.

6976604918789, 6976604918796, 6976604918802, 6976604918819, 6976604918826, 69766049188332Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 2026Barcode column of the six ANSI SKUs.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

Not available

June 20258Press articlexiaomitoday.com/nuphy-unveils-air75-v3-low-profile-wireless-mechanical-keyboard-with-long-battery-lifeRead 23 October 2026Launch article of June 12, 2025.9Press articlegreen-keys.info/en/nuphy-air75v3-is-now-available%ef%bd%9cnew-lineup-of-japanese-language-layoutsRead 23 October 2026Article of June 12, 2025: ANSI pre-orders from June 10, 2025.

Status

Available7Reviewtechradar.com/computing/keyboards/keychron-k2-ultra-8k-reviewRead 14 October 2026Review says the keyboard is available now at 119.99 USD.

Available1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page shows an Add to cart button on the access date.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$119.992Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Global/US store price 119.99 USD, shown without tax. The same launch price is in the launch report.

$139.958Press articlexiaomitoday.com/nuphy-unveils-air75-v3-low-profile-wireless-mechanical-keyboard-with-long-battery-lifeRead 23 October 2026Article: announced price 139.95 USD. US price. Tax treatment is not stated and US prices are normally without sales tax.9Press articlegreen-keys.info/en/nuphy-air75v3-is-now-available%ef%bd%9cnew-lineup-of-japanese-language-layoutsRead 23 October 2026Listed price 139.95 USD for the ANSI layout.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Black1Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 2026

Nova White, Nebula Dark1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Colour selector lists Nova White and Nebula Dark. Nebula Dark is sold in the ANSI layout only.2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 2026SKU names carry White and Dark. Colour names Nova White and Nebula Dark are on the product page.

Segment

Enthusiast2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Maker sells it as a wireless custom mechanical keyboard for work, typing and gaming.

Portable1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page headline is Wireless Mechanical Keyboard. It pitches the 75% size for small spaces, students and mobile work, and shows a travel case. Stored as portable.

Sold asiParts fitted when sold. A complete keyboard includes switches and keycaps. Barebones includes neither.

Complete1Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 2026Only a Fully Assembled type is sold. Switches and PBT keycaps are fitted.

Complete1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026In the box heading says PRE-BUILT KEYBOARD. Switches and keycaps are fitted.

Layout

3 of 12 differ

Form factoriLayout size or shape. A percentage describes the layout, not the number of keys.

75 %2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Maker states a 75% compact layout.

75 %1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs, Air 75 V3: Layout ANSI 75%.

Layout standardiPhysical key layout standards sold for this model. Regional language names are listed separately.

ANSI2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Product tags list Standard ANSI. The Global/US reference product is the only one stored.

ANSI1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Scope is the ANSI layout only. The maker also sells JIS, ISO German, ISO British and ISO French layouts. They are not stored.

Regional layouts

US ANSI2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Global/US store product with ANSI layout. The maker names it US ANSI Layout on its regional stores.

ANSI - US English1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Layout selector: ANSI - US English.

Keys in regional layoutiPhysical typing and function keys in the stated regional layout. Separate media buttons, macro buttons and rotary controls are excluded. A Touch ID or Lock key in a key row counts, as on Apple keyboards.

846Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Specifications page says number of keys 84. The default layout pages show the same 84 positions, including the right-hand Home, End, Page Up and Page Down column.

841Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs, Air 75 V3: Number of Keys 84.

Key legends for

macOS, Windows2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026The page says the keyboard comes with keycaps for both Windows and macOS.

macOS5Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026Review: macOS-biased by default, with all the macOS Fn buttons on the top row. The maker render shows CMD and OPT legends. Windows legends are not confirmed, so only macos is stored.

Numpad

No6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Layout pages show no number pad.

No1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026The 100% model is the one that features a Numpad. The Air 75 V3 is listed as 75% with 84 keys and the render shows no numpad.

Function row

Yes6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Layout pages show F1 to F12.

Yes1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page: Air 75 V3 features the F-row.

Dedicated arrow keys

Yes6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Layout pages show four arrow keys.

Yes4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 04 key diagrams show Fn with arrow keys.

Navigation keysiAvailability of Home, End, Page Up and Page Down as dedicated keys or through an Fn layer.

Compact6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Layout pages show dedicated Page Up, Page Down, Home and End keys in a right-hand column.

Compact6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: the PageDown keycap was swapped for Delete, so PageDown is a dedicated key. The maker render shows PgUp, PgDn, Home and End.

Key stagger

Row-staggered6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Layout pages show staggered rows.

Row-staggered1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Maker render shows a row-staggered layout.

Bottom row

Not available

Not available

Low profile

No1Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 2026Product tags list Profile Normal Profile.

Yes1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page: thin as 13.2mm. Tech specs list a low-profile switch.

Switches

13 of 25 differ

Switch sensing technologyiKey sensing technology. Hall effect and TMR are different sensor types. A mixed board is identified explicitly. Magnetic switch housing alone does not identify the sensor.

Mechanical6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Specifications page says switch type Mechanical.

Low-profile mechanical1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs, Air 75 V3: Switch Type Low-profile. Switches are mechanical Gateron low-profile 3.0. Stored as low_profile_mechanical.

Switch feel

Linear, Tactile3Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Switches-Specification.jpgRead 14 October 2026Apex Red is Linear. Apex Brown is Soft Tactile and Apex Banana is Tactile. Both are stored as tactile.

Linear, Tactile, Silent linear2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 2026Switch cards: Red nano 45gf Linear, Brown nano 50gf Tactile, Blush nano 42gf Linear. Blush is the silent variant (RTINGS: silent linear).3Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 2026Spec blocks per colour: Red linear, Brown tactile, Blush linear and silent.

Switch maker

Keychron2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Keychron Apex Switch.

Gateron1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page FAQ: Why choose Gateron Low-profile 3.0 Switches.

Switch models

Apex Red, Apex Brown, Apex Banana2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Keychron Apex Switch in Red, Brown and Banana. Short names Apex Red, Apex Brown and Apex Banana are stored.

Red nano, Brown nano, Blush nano2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 2026Names as sold: Red nano, Brown nano, Blush nano.3Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 2026Switch spec blocks Low-profile Red, Brown and Blush 3.0, sold on the keyboard as nano.

Switch stem

MX cross4Maker product pagekeychron.com/cdn/shop/files/keychron-K2-ultra-switch-details.jpgRead 14 October 2026Switch diagram labels a POM MX stem.

Not available

Actuation forceiForce at the point where a key registers. Initial spring force is not actuation force. Adjustable switches require a stated actuation setting.

45 to 55gf1Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 20263Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Switches-Specification.jpgRead 14 October 2026

42 to 50gf2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 20263Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 20265Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026

Bottom-out forceiForce at the end of the switch travel. It is not the initial spring force or the tactile peak.

Not available

55 to 65gf2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 20263Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 20265Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026

Tactile bump forceiPeak force of the tactile bump. It is not the force at initial movement or at bottom-out.

Not available

Not available

Actuation pointiDistance before a key registers. For adjustable boards, the default profile or setting is stated in the source note.

2mm3Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Switches-Specification.jpgRead 14 October 2026Pre-travel 2.0 plus or minus 0.5 mm for all three switches. This is a fixed mechanical pre-travel, not an adjustable setting.

1.7mm3Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 2026Pre-travel is 1.7 +/- 0.4 mm for Red, Brown and Blush. TweakTown and Tom's Guide also give about 1.7 mm.

Total travel

3.6 to 4mm1Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard.jsRead 14 October 20263Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Switches-Specification.jpgRead 14 October 2026

3.2 to 3.5mm2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 20263Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 20265Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026

Rated keystrokes

Not available

Not available

Factory-lubed switches

Yes3Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Switches-Specification.jpgRead 14 October 2026The graphic marks all three Apex switches as pre-lubed.

Yes3Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 2026Switch spec blocks: factory lube yes.

Adjustable actuation

Not available

No7Reviewrtings.com/keyboard/reviews/nuphy/air75-v3-air65-v3-air100-v3Read 23 October 2026Header: Output Type Non-Adjustable. Switch type mechanical. Test result cells are behind a membership and were not used.

Actuation rangeiSelectable actuation distances. These are settings, not a measured usable travel range.

Not available

Not available

Actuation stepiSmallest documented increment between selectable actuation settings.

Not available

Not available

Per-key actuationiActuation can be configured individually for supported keys. The source note identifies any excluded keys.

Not available

Not available

Rapid trigger

No8Reviewgamerevolution.comRead 14 October 2026Review says rapid trigger is not supported because the board uses conventional switches.

Not available

Minimum rapid trigger movementiSmallest selectable movement used to reset or reactivate a key. This is a setting, not measured accuracy.

Not available

Not available

Multi-action keys

Not available

Not available

SOCD handling

Yes7Reviewtechradar.com/computing/keyboards/keychron-k2-ultra-8k-reviewRead 14 October 2026Review lists a SOCD function with first-pressed priority, chosen-key priority or both cancel. It handles two simultaneous keys and is not analog gamepad output.

Yes5Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026Review: customizable SOCD resolutions in the NuPhyIO web app. The maker's name for it is not given.

Analog inputiCan send variable gamepad or joystick input. Magnetic sensing or adjustable actuation alone does not establish analog output.

Not available

Not available

Hot-swap socketsiSwitches can be replaced without soldering. Magnetic compatibility must be checked separately.

5-pin2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table says hot-swappable. The Apex switch diagram says 5-pin switch. Support for 3-pin switches is not stated for this model.

5-pin1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Hot-swappable Support Yes. The switch page states 5-pin mounting.3Maker product pagepay.nuphy.com/collections/all-1/products/gateron-low-profile-3-0-switchesRead 23 October 2026Switch spec blocks: 5-pin mounting for all four colours.

Compatible switches

Not available

Gateron low-profile 3.0 switches7Reviewrtings.com/keyboard/reviews/nuphy/air75-v3-air65-v3-air100-v3Read 23 October 2026Intro: hot-swappable PCB compatible with Gateron low-profile 3.0 switches.

Stabilizers

PCB screw-in2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists Screw-in PCB Stabilizer.

Plate-mounted1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Stabilizer Type Plate Mounted.

Factory-lubed stabilizers

Not available

Not available

Keycaps

1 of 5 differ

Keycap material

PBT2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists OSA Double-Shot PBT keycaps.

PBT1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Keycap Double-shot PBT.

Legend method

Doubleshot2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Double-shot PBT keycaps.

Doubleshot1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Keycap Double-shot PBT. The JIS review by green-keys calls the legends dye-sub. The maker wording is stored.

Keycap profile

OSA2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table and product tags list OSA profile.

Low profile5Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026Review: NuPhy's low-profile nSA keycaps. The profile is stored as low_profile.

Keycap thickness

Not available

Not available

Shine-through legendsiLight passes through the legends. Translucent keycap sides alone do not count.

No2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Page says the keycaps are non-shine-through PBT.

No7Reviewrtings.com/keyboard/reviews/nuphy/air75-v3-air65-v3-air100-v3Read 23 October 2026Sizes and variants table: default keycaps are double-shot PBT that are not shine-through.

Performance

7 of 11 differ

Polling rate per connectioniDocumented report rates for each connection. Required receivers or optional adapters are identified in the row and source note.

AKeychron K2 Ultra 8K

Connection	Polling rate (Hz)	Receiver or adapter
USB (wired)	8,000	Not available
2.4 GHz	8,000	Included Type-A 2.4 GHz receiver
Bluetooth	125	Not available

Source2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists 8000 Hz for wired and 2.4 GHz and 125 Hz for Bluetooth. The manual says the default is 1000 Hz for wired and 2.4 GHz and that the rate is changed in the Launcher. Only the maximum per connection is stored.

BNuPhy Air75 V3

Connection	Polling rate (Hz)	Receiver or adapter
USB (wired)	1,000	Not available
2.4 GHz	1,000	Included 2.4G dongle
Bluetooth	125	Not available

Source1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: 2.4GHz 1000 Hz, wired 1000 Hz, Bluetooth 5.0 125 Hz. The in-the-box list includes the 2.4G dongle.

Max polling rate

8,000Hz=CalculatedFrom Polling rate per connection

1,000Hz=CalculatedFrom Polling rate per connection

Polling rate (wired)

8,000Hz=CalculatedFrom Polling rate per connection

1,000Hz=CalculatedFrom Polling rate per connection

Polling rate (2.4 GHz)

8,000Hz=CalculatedFrom Polling rate per connection

1,000Hz=CalculatedFrom Polling rate per connection

Polling rate (Bluetooth)

125Hz=CalculatedFrom Polling rate per connection

125Hz=CalculatedFrom Polling rate per connection

Scan rateiHow often the keyboard reads its switches. A USB report rate does not establish a scan rate.

Not available

Not available

Input latency (claimed)iMaker-published input or response latency with conditions in the source note. Do not calculate this from polling rate.

Not available

Not available

Key rollover per connectioniKeys registered simultaneously over the stated connection. Connection is omitted if the source does not specify it.

AKeychron K2 Ultra 8K

Connection	Rollover
USB (wired)	NKRO
2.4 GHz	NKRO
Bluetooth	NKRO

Source2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists N-key rollover for wireless and wired. Bluetooth is a wireless mode.

BNuPhy Air75 V3

Rollover
NKRO

Source1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: N-key Rollover Support Yes. The page does not split it by connection.

Anti-ghosting

Not available

Not available

Adjustable debounce

Yes7Reviewtechradar.com/computing/keyboards/keychron-k2-ultra-8k-reviewRead 14 October 2026Review says press and reset debounce have separate sliders from 10 to 50 ms in 1 ms steps.

Not available

Minimum debounce

10ms7Reviewtechradar.com/computing/keyboards/keychron-k2-ultra-8k-reviewRead 14 October 2026Lowest selectable value is 10 ms in the Launcher. It is not a measured latency.

Not available

Measured

None of 7 known

Latency per connection (measured)iReviewer measurements for one tested setup per row. Settings and test method are stated in the source note. Missing conditions are not inferred.

Not available

Not available

Actuation point (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Total travel (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Operating force (measured)iReviewer-measured force at actuation. The switch and actuation setting are stated in the source note.

Not available

Not available

Typing noise (measured)iReviewer-measured A-weighted typing sound level. Measurement distance and conditions are stated in the source note.

Not available

Not available

Battery life (measured)iMeasured by a reviewer, not claimed by the maker

Not available

Not available

Weight (measured)iReviewer-measured keyboard weight without cable or wrist rest. The tested configuration is stated in the source note.

Not available

Not available

Connectivity

6 of 18 differ

Connections

USB (wired), 2.4 GHz, Bluetooth2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists 2.4 GHz, Bluetooth 5.2 and Type-C wired.

USB (wired), 2.4 GHz, Bluetooth1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Mode 2.4GHz, Wired (USB-C) or Bluetooth 5.0.

Wireless technology

Not available

Not available

Bluetooth

5.22Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists Bluetooth 5.2.

5.01Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Bluetooth 5.0. A launch news article says 5.1. The maker page is stored.

Bluetooth device slots

36Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Page 18 says up to 3 devices through Fn+1, Fn+2 and Fn+3.

34Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 03: Fn+1, Fn+2, Fn+3 select Bluetooth 1, 2 and 3. Fn+4 selects 2.4GHz. Long press for 3 seconds pairs.7Reviewrtings.com/keyboard/reviews/nuphy/air75-v3-air65-v3-air100-v3Read 23 October 2026Verdict: Bluetooth with up to three devices at once.

Devices it can switch betweeniDistinct device connections available for switching. Do not infer this by adding wireless modes or paired Bluetooth slots.

Not available

45Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026Spec table: Paired devices max 4. This fits the manual's three Bluetooth slots plus the 2.4G dongle.

Device switchingiControl used to switch between paired device hosts. Connection-mode and OS switches are described separately.

Keys6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026A short press of Fn+1, Fn+2 or Fn+3 switches Bluetooth host. The side toggle chooses the connection mode.

Keys4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 03: short press of Fn plus a number key switches between devices.

Receiver connector

USB-A6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026The box holds a Type-A 2.4 GHz receiver and an extension adapter.

Not available

Receiver storage in keyboard

Not available

Yes4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026The rear edge diagram shows a NuPhy dongle slot. TweakTown also says there is a slot on the back for the dongle.6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: a slot on the back for the 2.4 GHz dongle.

Receiver shared with other devices

Not available

Not available

Wireless range

10m6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Specifications page says Bluetooth operating distance within 10 meters in open space. It is not a 2.4 GHz guarantee.

Not available

Detachable cable

Yes6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026A Type-C cable plugs into the keyboard port.

Yes4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026The box holds a USB-C to USB-C cable and the keyboard has a USB-C port.

Port on keyboard

USB-C6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Type-C port on the keyboard.

USB-C4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Same rear edge diagram: a USB-C port.

Cable plug

USB-C6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026The box holds a Type-C cable and a separate Type-A to Type-C adapter. The cable end that goes to the computer is Type-C.

USB-C1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Box list: USB-C to USB-C cable, so the plug at the computer end is USB-C.

Cable

Not available

Not available

Cable length

Not available

Not available

USB passthrough

Not available

Not available

Works withiSystems on which the keyboard works. Configuration software may have narrower system support.

macOS, Windows, Linux, iOS, Android2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists macOS, Windows and Linux. The manual also names iOS and Android modes.

Windows, macOS, Linux, iOS, Android1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Compatible System macOS/Windows/Android/iOS. Linux is added from the Tom's Guide and TweakTown spec tables.5Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026Spec table: macOS, Windows, Linux.

Consoles

Not available

Not available

Battery

6 of 16 differ

Battery type

Li-Po2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists a rechargeable lithium polymer battery.

Not available

Number of batteriesiNumber of replaceable AA or AAA cells required. Internal rechargeable battery packs are not counted here.

Not available

Not available

Battery capacity

4,000mAh2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists 4000 mAh.

4,000mAh1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs, Air 75 V3: Battery Capacity 4000mAh. The 2500 mAh figure in the same table is the Air 65 V3.

User-replaceable battery

Not available

Not available

Battery life per mode (claimed)iMaker estimates. Store one published native duration unit per row: hours, days or months. Days and months describe calendar use including idle time, not continuous runtime. Do not convert calendar estimates into hours. Connection, lighting and polling rate are included only when published. Brightness, workload, screen status, sleep settings and up-to qualifiers go in the source note.

AKeychron K2 Ultra 8K

Connection	Lighting	Polling rate (Hz)	Hours (h)
2.4 GHz	Off	8,000	760
2.4 GHz	On	8,000	225

Source2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table says up to 760 hours at 8K with the backlight off and up to 225 hours at 8K with the lowest RGB brightness. The short description calls the 760 hours wireless 8K mode, so both rows use 2.4 GHz. Firmware version and workload are not stated.

BNuPhy Air75 V3

Lighting	Hours (h)
Off	1,200
On	100

Source1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs, Air 75 V3: Working Time all lights off up to 1200 hours, all lights on 60~100 hours, both lab test results. Page: measured with RGB lighting turned off for the 1200 hour figure. The up-to value 100 hours is stored for lights on and the 60 hour low end is not. Connection, brightness and effects are not stated.

Longest battery life (claimed)iLongest maker estimate published in hours across the listed modes. Rows published in days or months do not contribute. Conditions can differ between products.

760h=CalculatedFrom Battery life per mode (claimed)

1,200h=CalculatedFrom Battery life per mode (claimed)

Battery life, lighting offiLongest maker estimate published in hours with lighting off. Calendar-day and calendar-month estimates are not converted and do not contribute.

760h=CalculatedFrom Battery life per mode (claimed)

1,200h=CalculatedFrom Battery life per mode (claimed)

Battery life, lighting oniLongest maker estimate published in hours with lighting enabled. Calendar-day and calendar-month estimates are not converted and do not contribute. Brightness and display conditions are stated in the source note.

225h=CalculatedFrom Battery life per mode (claimed)

100h=CalculatedFrom Battery life per mode (claimed)

Battery life, backlight on (claimed)iLongest maker up-to estimate published in calendar days with backlighting enabled. Includes idle time and the source-defined usage pattern, not continuous runtime. Brightness, workload, connection and sleep conditions remain in the table and source note. Hours and months are not converted.

Not available

Not available

Battery life, backlight off (claimed)iLongest maker up-to estimate published in calendar months with backlighting off. Includes idle time and the source-defined usage pattern, not continuous runtime. Workload, connection and sleep conditions remain in the table and source note. Hours and days are not converted.

Not available

Not available

Charging port

USB-C6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Specifications page says charging port Type-C.

USB-C4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 02 diagram: one USB-C port with a cable icon on the rear edge.

Full charge timeiPublished time for a full charge. Approximate times remain qualified in the source note.

300min6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Around 5 hours. This is an approximate maker figure. Charging is up to 5 V and 1 A.

300min10Spec databasegreen-keys.info/en/keyboard/nuphy%EF%B8%8E-air75-v3-us-jisRead 23 October 2026Spec table: charging time about 5 hours for a full charge. Stored as 300 minutes and it is approximate. The maker page does not state a charge time.

Quick charge

Not available

Not available

Use while charging

Yes6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Page 17 says the keyboard can be charged in 2.4 GHz, cable and Bluetooth mode.

Not available

Solar charging

Not available

Not available

Battery indicator

LED6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Power indicator LED shows low power in blinking red, charging in static red and full in static green. The Batt key does not say how it shows the level, so no key lighting is assumed.

LED4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Right side RGB bar shows the battery level in colours (red 1 to 10 percent, orange 11 to 95, green 96 to 100). Fn+| turns on a permanent battery display. TweakTown says the sidelights are cosmetic. The manual is stored.

Build

5 of 8 differ

Case material

CNC aluminum frame and ABS bottom case2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists body material CNC aluminum plus ABS and a bottom case material of ABS.

Aluminum top case, ABS bottom case1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Top Case Aluminum, Bottom Case ABS.6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: CNC-machined aluminum top case with a brushed finish on the white model and a transparent ABS bottom case.

Plate material

Steel2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists a steel plate.

Polycarbonate1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Plate Material PC.

Mount style

Tray8Reviewgamerevolution.comRead 14 October 2026Review describes a tray-mounted steel plate. Keychron does not state the mount style.

Gasket1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Mount Type Gasket.

Flex cuts in PCB

Not available

Not available

Sound dampeningiDampening layers the maker or a review names. Foam whose position in the stack is not stated is foam. Films, pads and silicone parts that fit no other option are other.

Silicone bottom, Foam, position not stated, Other2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026The page lists EVA foam, IXPE foam with PET film, EPDM foam, a bottom case PET film and a silicone bottom pad. Only the silicone pad has an exact option. The foams are stored as foam because their position is not stated. The PET films are other.

Foam, position not stated, Silicone bottom11Reviewgreen-keys.info/en/nuphy-air75-v3-jis-japanese-array-review%EF%BD%9Cthe-appeal-of-a-low-profile-keyboard-with-a-change-in-keystroke-sound-directionRead 23 October 2026JIS layout review: sound-absorbing foam and a silicone sheet on the bottom, visible through the ABS base. RTINGS also mentions layers of internal sound-dampening material. Foam position is not stated, so it is stored as foam.

Typing anglesiKeyboard slope for each supported foot position, starting with the lowest. An adjustable-foot count does not establish angles. When the maker publishes only the angle with the feet out, that angle is stored alone.

Not available

4°, 8°, 10°1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Type Angle 4/8/10 degrees. Page: 3-stage adjustable kickstand.

Spill resistant

Not available

Not available

IP rating

Not available

Not available

Lighting

2 of 7 differ

Backlight

RGB per key2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Page describes Per-key RGB and a Mix RGB mode with two lighting zones.

RGB per key1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: North-facing RGB-LED, 20 backlight modes. Per-key lighting is stated by the Tom's Guide spec table.5Reviewtomsguide.com/computing/peripherals/nuphy-air75-v3-reviewRead 23 October 2026Spec table: Backlighting Per-key RGB. TweakTown says the lighting appears to be zone-based. Tom's Guide is stored and the maker page says RGB-LED without a zone count.

LED position

South-facing2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists south-facing RGB LED.

North-facing1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: Backlight North-facing RGB-LED. The green-keys spec table says south-facing. The maker is stored.6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: north-facing per-key lighting.

Lighting zones

Not available

Not available

Brightness levelsiSelectable onboard brightness steps. The source note states whether the off position is included.

Not available

Not available

Side or underglow lighting

Not available

Yes4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Sections 05 and the RGB status guide: left side and right side RGB light bars with their own brightness, effect, colour and speed keys.

Lighting sensors

Not available

Not available

Lighting sync

Not available

Not available

Controls

8 of 12 differ

Media keysiPlayback controlled by separate buttons, an Fn layer or a multifunction knob/rocker. Volume controls are listed separately, and knob presses are excluded from the separate media-button count.

Fn layer6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Mac layer has playback keys on the top row. The Windows layer reaches them through Fn. These share function positions with other keys.

Fn layer1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page: a Mac multimedia key layout, with shortcut keys for Mission Control, focus, dictation and screenshots. These are Fn-row keys and no separate media buttons are listed.

Separate media buttonsiSeparate physical buttons for playback or mute, counted once each. Fn shortcuts, macro buttons, knob presses and roller presses are excluded.

Not available

Not available

Volume control

Keys6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Volume keys on the function row. There is no knob.

Knob1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page: the top-right position takes a control knob. RTINGS says it controls volume by default.4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Knob diagram: volume up, volume down, mute and unmute.

Knobs

06Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026The overview page and layouts show no rotary control.

11Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026One knob position at the top right. Two knob modules, high and low, are in the box for it.

Programmable knob

Not available

Yes1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page, Functional Knob: pair it with NuPhyIO for quicker controls. Page: low-profile knob module and high-profile knob module are both in the box.4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 10: NuPhyIO web configurator with Mac and Win layers.

Knob press

Not available

Yes4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Knob diagram: turn for volume up and down, press for mute and unmute.

Separate macro keysiSeparate physical keys or buttons intended for macros. Excludes ordinary remappable keys, media buttons and a dedicated software-launch button.

Not available

01Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026No separate macro keys on the render or in the manual diagrams.4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026No separate macro keys in the manual diagrams.

Built-in screen

Not available

None4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026No screen in the manual diagrams or the maker render.

Touchpad

Not available

No4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026No touchpad in the manual diagrams or the maker render.

Fingerprint reader

Not available

No4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026No fingerprint reader in the manual diagrams or the maker render.

OS mode switch

Switch6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Side toggle Win/Android and Mac/iOS.

Switch4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 01: slide switch for Win mode and Mac mode. Section 02: slide switch for power off, wired and wireless.

Windows key lock

Not available

Not available

Software

3 of 10 differ

Software

Keychron Launcher2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026The page names the Keychron Launcher web app.

NuPhyIO6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: NuPhyIO website, the portal for the latest customization tools.

Software runs on

Web2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Launcher is a web app. It needs a current Chrome, Edge or Opera browser and a wired connection.

Web6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: NuPhyIO is a web-based customization tool. RTINGS says NuPhyIO 2.0 also has an offline client, which is not stored as a platform.

Open firmware

ZMK2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Page states open-source ZMK firmware.

Not available

Onboard memory

Yes6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Page 8 says four layers of key settings are on the keyboard. No profile-slot count is given.

Yes6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: changes are stored in two on-board profiles. Export is advised before a reset.

Onboard profilesiProfiles stored on the keyboard, including fixed defaults when the maker counts them. Software-only profiles are excluded.

Not available

26Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: only two on-board profiles, one for Windows and one for Mac.

Macros

Yes2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Page says macros are created in the Launcher.

Yes6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: NuPhyIO can record and create custom macros.

Macros stored onboardiRecorded command sequences run from keyboard storage without the configuration app. Onboard lighting or remapping alone does not establish this.

Not available

Not available

Key remapping

Yes2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Page says each key can be remapped in the Launcher.

Yes6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: select a key in NuPhyIO and change its function.

LayersiTotal key mapping layers including the base layer. Lighting effect layers and profile slots are excluded.

46Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Page 8 says four layers. Layers 0 and 1 are for Mac and layers 2 and 3 for Windows.

44Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026Section 10: Mac mode layers 0 to 3 and Win mode layers 4 to 7. That is 4 layers per OS mode and the base layer is included.

User firmware updates

Yes6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026Page 9 describes a firmware update through the Keychron Launcher in wired mode.

Yes6Reviewtweaktown.com/reviews/11177/nuphy-air75-v3-low-profile-wireless-keyboard-smooth-operator/index.htmlRead 23 October 2026Review: the NuPhyIO portal upgrades the firmware from the browser.

Ergonomics

0 of 4 differ

Wrist rest

None7Reviewtechradar.com/computing/keyboards/keychron-k2-ultra-8k-reviewRead 14 October 2026Review says no wrist rest is included.

None1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026The Mono Wrist Rest is a separate paid add-on and not in the box.

Wrist rest material

Not available

Not available

Tenting

Not available

Not available

Tenting angles

Not available

Not available

Dimensions and weight

2 of 6 differ

DimensionsiKeyboard body dimensions with fitted keycaps, without wrist rest and with feet folded. Any different measurement condition is stated in the source note. Width is the longest side, depth runs front to back and height is the thickness. Map by size when the maker's labels differ.

Width311.5Depth121.54mm(12.3 × 4.8 in)2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists 311.50 x 121.54 mm. Front height 22.85 mm and back height 31.20 mm exclude keycaps, so no fitted height is stored.

Width318.9Depth128.9Front height13.2mm(12.6 × 5.1 × 0.5 in)1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs: 318.9 mm x 128.9 mm x 13.2 mm. TweakTown and green-keys describe 13.2 mm as the thickness at the front edge, so it is stored as front height and not as height.

Dimensions with wrist rest

Not available

Not available

Keyboard weightiKeyboard without cable or wrist rest. Weights that include accessories cannot be stored here. A cable that cannot be removed is included. Replaceable batteries are included, as built-in batteries are.

1,084g(2.4 lb)2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026Specs table lists 1084 g plus or minus 10 g.

724g(1.6 lb)1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Tech specs, Air 75 V3: 724 grams. TweakTown lists 735 grams and Tom's Guide 1.65 lb. The maker is stored.

Weight including wrist restiKeyboard plus supplied wrist rest, excluding packaging. The source note identifies any included cable.

Not available

Not available

Box dimensions

Not available

Not available

Box weightiOne retail package including its contents. A multi-unit shipping carton weight is excluded.

Not available

Not available

Certifications

None of 2 known

Platform certifications

Not available

Not available

Other certifications

Not available

Not available

In the box

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In the box

K2 Ultra 8K wireless mechanical keyboard, Type-C cable, Type-A to Type-C adapter, Keycap and switch puller, Screwdriver, Hex key, Type-A 2.4 GHz receiver, Extension adapter for receiver, Extra keycaps set, Manual, Quick Start Guide5Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Inbox_293d4512-8928-430b-acae-a15c3c2eb762.jpgRead 14 October 2026Box graphic lists the keyboard, Type-C cable, Type-A to Type-C adapter, 2.4 GHz receiver, extension adapter, keycap and switch puller, screwdriver and hex key. The manual adds the extra keycap set, manual and quick start guide. The manual does not list the screwdriver and hex key.

Air75 V3 Keyboard, USB-C to USB-C Cable, High-Profile Knob Module, Low-Profile Knob Module, 2.4G Dongle, Screwdriver, Keycap/Switch Puller, User Manual/FAQ Download, Extra Keycaps (6 for ANSI-US)1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Air 75 V3 box list. Extra keycaps: ANSI-US 6, JIS 7, ISO-DE 7, ISO-UK 14, ISO-FR 24. The page says old and new packaging ship at random.2Maker product pagepay.nuphy.com/products/nuphy-air75-v3Read 23 October 2026Page repeats the box list with extra keycaps by layout. ANSI-US has 6.

Cables included

AKeychron K2 Ultra 8K

Type	Count
Type-C cable	1

Source5Maker product pagekeychron.com/cdn/shop/files/Keychron-K2-Ultra-8K-Inbox_293d4512-8928-430b-acae-a15c3c2eb762.jpgRead 14 October 2026One Type-C cable. The Type-A to Type-C adapter is not a cable.

BNuPhy Air75 V3

Type	Count
USB-C to USB-C Cable	1

Source1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Box list: 1 x USB-C to USB-C Cable.

Spare switches

Not available

Not available

Links

Not compared

Product page

www.keychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboard2Maker product pagekeychron.com/products/keychron-k2-ultra-8k-wireless-custom-mechanical-keyboardRead 14 October 2026

nuphy.com/products/nuphy-air75-v31Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Read in Chrome because curl and WebFetch hit a Vercel security checkpoint and a 429.

Spec sheet

Not available

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Manual

cdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdf6Owner's manualcdn.shopify.com/s/files/1/0059/0630/1017/files/Keychron_K2_Ultra_8K_User_Manual_ee0396a9-bad0-45d4-83bf-712411c861d1.pdfRead 14 October 2026

cdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdf4Owner's manualcdn.shopify.com/s/files/1/0268/7297/1373/files/Air75_V3.pdfRead 23 October 2026One-page Quick Guide in English, Chinese, Japanese and Korean, linked as User Manual/FAQ on the product page. The PDF is an image and has no text layer.

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

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Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year10Maker product pagekeychron.com/pages/warrantyRead 14 October 2026Global store warranty is twelve months unless purchase documents say otherwise. Regional terms and local law can differ. The quick start guide says defective parts are replaced rather than the whole keyboard.

1year1Maker product pagenuphy.com/products/nuphy-air75-v3Read 23 October 2026Page: 1-Year warranty. The page does not name a market.

Both are also in the API. Back to all keyboards.