Smartwatches / Compare

Apple Watch SE 2 vs Apple Watch Ultra 4

A

Product A: Apple

Watch SE 2

97 of 150 known

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B

Product B: Apple

Watch Ultra 4

107 of 150 known

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Every value links to where we found it.

Only differences

AApple Watch SE 2

BApple Watch Ultra 4

General

8 of 10 differ

Series

Apple Watch SE1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Apple Watch Ultra3Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026

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

A2722, A2723, A2726, A2727, A2725, A2724, A2855, A28562Maker product pagesupport.apple.com/en-us/108056Read 10 October 2026GPS: 40mm A2722, 44mm A2723. GPS + Cellular 40mm: A2726 North America, A2725 Europe and Asia Pacific, A2855 China mainland. 44mm: A2727 North America, A2724 Europe and Asia Pacific, A2856 China mainland.

A3579, A35804Maker product pagesupport.apple.com/en-us/108056Read 8 October 2026Apple Watch Ultra4:49mm A3579 covers North America, Europe and Asia Pacific, including the Japanese review market. A3580 covers China mainland. No Chinese regional test is claimed.

GTIN / EAN

Not available

Not available

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

7 September 20223Press releaseapple.com/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026Release dated September 7, 2022.

9 September 20263Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026

Status

Discontinued8Press articlewccftech.com/apple-discontinues-three-older-apple-watch-models-as-se-3-series-11-and-ultra-3-take-the-spotlight/ampRead 10 October 2026Dated September 9, 2025. Apple discontinued the SE 2 after the SE 3 launch and removed it from sale. A second report (appleosophy.com, September 11, 2025) says the SE 2 is no longer in production.

Available5Maker product pageapple.com/shop/buy-watch/apple-watch-ultraRead 30 September 2026

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

Not available

Apple Watch Ultra 314Reviewtechradar.com/health-fitness/smartwatches/apple-watch-ultra-4-vs-apple-watch-ultra-3-whats-changed-and-should-you-upgradeRead 23 October 2026TechRadar calls the Apple Watch Ultra 3 the previous gen of the Apple Watch Ultra 4.15Press articlemacrumors.com/2026/09/16/apple-watch-ultra-3-vs-ultra-4Read 23 October 2026MacRumors says the Apple Watch Ultra 4 improves on its predecessor and notes the Ultra 3 launched last year.

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.

Apple Watch SE 37Press releaseapple.com/newsroom/2025/09/apple-introduces-apple-watch-se-3Read 10 October 2026Apple introduced the next generation of Apple Watch SE with the Apple Watch SE 3.31Reviewtomsguide.com/wellness/smartwatches/apple-watch-se-3-unveiled-cost-release-date-key-features-battery-and-moreRead 23 October 2026Tom's Guide says Apple left the SE alone since 2022 and calls the SE 3 the refreshed Apple Watch SE (3rd generation) after the SE (2nd gen).

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.

$2493Press releaseapple.com/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026Apple Watch SE starts at $249 (US). The release does not list per-configuration prices, so only the starting price is stored on the 40mm GPS model.

$7993Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Pricing and Availability: starting US launch price.

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.

€2994Press releaseapple.com/de/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026German release: Apple Watch SE ab 299 Euro inkl. MwSt. Starting price, applied to the 40mm GPS model.

€89911Press releaseimages.apple.com/de/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Pricing and Availability: starting EUR price including German VAT.

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

AU, CA, FR, DE, IN, JP, AE, GB, US3Press releaseapple.com/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026Customers in Australia, Canada, France, Germany, India, Japan, the UAE, the UK, the US and more than 40 other countries and regions could order at launch. Only the named countries are stored.

AU, CA, FR, DE, IN, JP, AE, GB, US, CN3Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Pre-order in Australia, Canada, France, Germany, India, Japan, the UAE, the UK, the U.S. and more than 50 other countries. CN from the China mainland model number

ColoursiThe maker's own colour names

Midnight, Starlight, Silver2Maker product pagesupport.apple.com/en-us/108056Read 10 October 2026Midnight, Starlight or Silver aluminum.

Natural, Black1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Segment

Smartwatch3Press releaseapple.com/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026Presented as one of the two best-selling smartwatches, the lower-priced Apple Watch.

Outdoor3Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026Apple calls it the ultimate sports and adventure watch

OS updates promisediYears of explicitly promised OS updates. A security-only support period does not establish an OS-upgrade promise.

Not available

Not available

Security updates untiliExact end date published for security-update support of this model. Do not calculate it from a stated number of years. A security-only period does not promise OS upgrades.

Not available

Not available

Case

6 of 8 differ

Case sizeiMarketed case-size options. The marketed size can differ from physical case height, such as ceramic editions. Base dimensions describe the smallest base-material case.

40mm1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

49mm1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Case shape

Rectangular2Maker product pagesupport.apple.com/en-us/108056Read 10 October 2026Apple Watch cases are rounded rectangles. Case sizes are not screen diagonals.

Rectangular1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Rounded rectangular outline observed in the model-labeled In the Box manufacturer illustration. Geometry classification only, not a size or material inference.

Case materialiMaterial of the housing body, not just the bezel. Use Mixed when the maker describes a mixture of housing/frame materials. Read the published-material field for the parts and proportions.

Aluminium1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Titanium1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Case material (as published)

Aluminum1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Titanium case, Grade 51Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

BackiMaterial of the back of the smallest base-material case. Other materials or regional editions can differ. See source notes.

Molded nylon composite2Maker product pagesupport.apple.com/en-us/108056Read 10 October 2026Ion-X glass, Retina display and molded nylon composite back.

Ceramic back4Maker product pagesupport.apple.com/en-us/108056Read 8 October 2026Sapphire crystal, Retina display, and ceramic back

Case dimensionsiPhysical case height, width and thickness. The source note states exclusions such as the heart-rate sensor protrusion.

Height40Width34Thickness10.7mm(1.6 × 1.3 × 0.4 in)1Maker product pagesupport.apple.com/en-us/111853Read 10 October 202640mm: height 40, width 34, depth 10.7 mm. 44mm: height 44, width 38, depth 10.7 mm.

Height49Width44Thickness12mm(1.9 × 1.7 × 0.5 in)1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Weight (case only)iWatch body without a strap. An unqualified published weight must not be assumed to exclude the strap.

26.4g(0.9 oz)1Maker product pagesupport.apple.com/en-us/111853Read 10 October 202640mm: 26.4 g GPS and 27.8 g GPS + Cellular. 44mm: 32.9 g GPS and 33 g GPS + Cellular. Apple lists weight by case size and radio, not by band.

63g(2.2 oz)1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Case weight. Natural 63.0 grams, black 63.1 grams

Weight with strapiWatch with the stated strap attached. Strap material and case size belong in the source note. Reviewer measurements belong in measured fields.

Not available

Not available

Durability

6 of 8 differ

Water resistanceiStatic water-pressure rating in atmospheres. It is not a safe swimming or diving depth. Diving limits are listed separately.

5ATM1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Water resistance 50m (swimproof). Footnote 6: 50 meters under ISO standard 22810:2010 for shallow-water use. Not for scuba diving.

10ATM1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as water resistance 100m under ISO 22810:2010. 100 m is 10 ATM

Water resistance standard

ISO 22810:20101Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

ISO 22810:20101Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Durability and footnotes.

Dust and water rating

Not available

IP6X1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Dive rating

Not available

EN 133191Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026EN13319 recreational scuba diving to 40m (±1m accuracy)

Max dive depthiMaker-rated depth for the stated diving use, not a conversion from the water-resistance pressure rating.

Not available

40m1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

MIL-STD-810iMaker claim that the watch was tested against specified MIL-STD-810 methods. It is not a guarantee for every military-standard test.

Not available

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Tested to MIL-STD 810H

MIL-STD-810 tests

Not available

altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, shock and vibration1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Operating temperatureiPublished operating range. Source notes identify on-wrist limits and other operating conditions. Storage or charging limits are excluded.

Min0Max35°C1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Environmental requirements: operating temperature 32 to 95 F (0 to 35 C). Storage -20 to 45 C is excluded.

Min0Max35°C1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Environmental Requirements > Operating temperature: 0 to 35 C. Separate on-wrist operating range is -20 to 55 C and dive operating range is 0 to 40 C.

Display

10 of 14 differ

Display type

LTPO OLED1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

LTPO OLED1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Display type (as published)

Retina LTPO OLED display1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Always-On Retina display with wide-angle OLEDs and LTPO31Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Screen sizeiPublished active display diagonal for a rectangular display, or diameter for a round display. Do not calculate it from pixels or display area.

1.57in(4 cm)24Spec databasem.gsmarena.com/apple_watch_se_2-11865.phpRead 10 October 2026Lists 1.78 inches for the 44mm model (448 x 368 pixels). A 1.57 inch 40mm value is not listed here.26Retailer pagedeviceguides.vodafone.co.uk/apple/watch-se-2nd-gen-watchos-9/specificationsRead 10 October 202640 mm: 1.57 inches, 394 x 324 pixels. 44 mm: 1.78 inches, 448 x 368 pixels. 326 ppi from Apple fits both.

1.98in(5 cm)7Spec databasegsmarena.com/apple_watch_ultra_4-14935.phpRead 30 September 20261.98 inches. DC Rainmaker's review also states 1.98 inch

Resolution

324 × 394px1Maker product pagesupport.apple.com/en-us/111853Read 10 October 202640mm: 324 by 394 pixels. 44mm: 368 by 448 pixels.

422 × 514px1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Pixel densityiPublished pixel density. A rectangular diagonal formula must not be applied to a round display.

326ppi1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026326 pixels per inch, as published. The sheet gives it once for both sizes.

326ppi1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Display area

759mm²1Maker product pagesupport.apple.com/en-us/111853Read 10 October 202640mm: 759 sq mm. 44mm: 977 sq mm.

1,245mm²1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Touchscreen

Yes11Owner's manualsupport.apple.com/guide/watch/use-buttons-and-gestures-apd1d9d7efca/26/watchos/26Read 10 October 2026watchOS 26 guide: tap, touch and hold, and swipe on the screen.26Retailer pagedeviceguides.vodafone.co.uk/apple/watch-se-2nd-gen-watchos-9/specificationsRead 10 October 2026LTPO OLED touch screen, 16 million colours.

Yes2Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026Tap gestures and touch-based controls on the display

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

Min refresh rateiLowest published display refresh rate, usually in always-on mode. It is not the active-use minimum unless stated.

Not available

1Hz1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Peak brightnessiMaker peak-brightness claim. It may apply to a small area or bright ambient light. Full-screen limits and battery/temperature conditions belong in source notes.

1,000nits1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Up to 1000 nits maximum brightness. Conditions are not stated.

3,000nits1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Minimum brightness

Not available

1nit1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Always-on display

No7Press releaseapple.com/newsroom/2025/09/apple-introduces-apple-watch-se-3Read 10 October 2026SE 3 'now features an Always-On display', so the previous generation (SE 2) has none.14Reviewdcrainmaker.com/2022/12/apple-watch-se-2nd-gen-2022-in-depth-review.htmlRead 10 October 2026Review: no always-on display. The screen turns off when the wrist is lowered.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Display cover

Other glass1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Sapphire1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Display cover (as published)

Ion-X front glass1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Ion-X front glass.

Flat sapphire crystal1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Platform

5 of 15 differ

Platform

watchOS3Press releaseapple.com/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026watchOS 9 platform.

watchOS1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

OS at launch

watchOS 93Press releaseapple.com/newsroom/2022/09/apple-reveals-apple-watch-series-8-and-the-new-apple-watch-seRead 10 October 2026With watchOS 9, SE users get the new Compass app. watchOS 9 came on September 12, 2022.

watchOS 273Press releaseapple.com/newsroom/2026/09/apple-unveils-apple-watch-ultra-4Read 30 September 2026

Software

Not available

Not available

Latest OS

watchOS 26.620Maker product pagesupport.apple.com/en-us/100100Read 10 October 2026Apple security releases list watchOS 26.6 (July 27, 2026) for Apple Watch Series 6 and later. watchOS 27 (September 14, 2026) is for Apple Watch Series 9 and later, which excludes the SE (2nd generation).21Press articleslashgear.com/2190231/apple-watchos-27-compatible-modelsRead 10 October 2026Lists the Apple Watch SE (2nd generation) among the models that will not be updated to watchOS 27.22Press articlemacobserver.com/news/watchos-26-6-now-available-how-to-update-and-whats-newRead 10 October 2026watchOS 26.6 (July 27, 2026) is available for Apple Watch Series 6 and later, Apple Watch SE 2 and later, and every Apple Watch Ultra model.25Spec databaseeverymac.com/systems/apple/apple-watch/specs/apple-watch-se-2-2022-gps-cellular-40mm-us-canada-a2726.htmlRead 10 October 2026EveryMac: maximum OS watchOS 26.x. The SE 2 does not support watchOS 27.

watchOS 27.0.112Maker product pagesupport.apple.com/en-us/100100Read 30 September 2026Get the latest software updates: latest watchOS is 27.0.1, expanded September 28. SE 3 eligibility is also explicitly confirmed in 9to5Mac September 28 coverage.

Works with

iOS1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

iOS5Maker product pageapple.com/shop/buy-watch/apple-watch-ultraRead 30 September 2026Apple Watch is only compatible with iPhone

Phone requirement

Current sheet: iPhone Xs or later, including iPhone SE (2nd generation or later), with iOS 18 or later. At launch: iPhone 8 or later with iOS 16.1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Compatibility line is the current sheet requirement. The launch release names iPhone 8 or later with iOS 16.

iPhone 11 or later, including iPhone SE (2nd generation or later), with iOS 27 or later1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

App store

Yes10Owner's manualsupport.apple.com/guide/watch/get-apps-apd99e3c6a68/26/watchos/26Read 10 October 2026watchOS 26 guide: open the App Store on the watch and tap Get to install an app. watchOS 26 supports this model.

Yes9Owner's manualsupport.apple.com/en-gb/guide/watch/welcome/27/watchos/27Read 30 September 2026App Store section: install apps on Apple Watch.

Voice assistants

Siri1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Controls list Siri.

Siri1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Chipset

Apple S8 SiP1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026S8 SiP with 64-bit dual-core processor and 2-core Neural Engine.

Apple S111Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Process

7nm29Press articleithome.com/0/640/466.htmRead 10 October 2026Article dated September 12, 2022: the S6, S7 and S8 are based on the A13 Bionic and made on TSMC's 7nm process, with the same CPU identifier T8301. The claim comes from chip identifiers, not from Apple, which does not publish the node.30Press articleiphone-mania.jp/news-485990/ampRead 10 October 2026Article dated September 13, 2022, citing MacRumors: the S8 has the same CPU identifier as the S6 and S7, which were made on TSMC's 7nm process. Notebookcheck's spec table also lists 7 nm for the S8, per search snippet only.

Not available

CPU cores

21Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Dual-core processor. The Neural Engine cores are not counted.

21Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026S11 chip with 64-bit dual-core processor

CPU configuration

Not available

Not available

Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

Not available

Memory

2 of 2 differ

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

1GB24Spec databasem.gsmarena.com/apple_watch_se_2-11865.phpRead 10 October 2026Internal: 32GB 1GB RAM.25Spec databaseeverymac.com/systems/apple/apple-watch/specs/apple-watch-se-2-2022-gps-cellular-40mm-us-canada-a2726.htmlRead 10 October 2026EveryMac lists 1 GB onboard RAM for the SE 2 (asterisked, Apple does not publish it).26Retailer pagedeviceguides.vodafone.co.uk/apple/watch-se-2nd-gen-watchos-9/specificationsRead 10 October 20261 GB RAM with 32 GB storage.

4GB8Press articlemacrumors.com/2026/09/10/apple-watch-series-12-ultra-4-increased-ramRead 30 September 20264GB according to Apple's developer tool Xcode 27

StorageiTotal built-in storage the maker states, in decimal GB. Space available to the user is lower and goes in the source note. A figure the maker gives only as available space is not stored.

32GB1Maker product pagesupport.apple.com/en-us/111853Read 10 October 202632GB capacity.

64GB1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Health sensors

5 of 8 differ

Heart rate sensor

Second-generation optical heart sensor1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Always-on optical heart sensor1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Sensors > Health Sensing System: exact optical sensor name. Electrical sensor generation is separate.

ECG capabilityiElectrical heart sensing hardware with an ECG capability. The ECG app can require an eligible country, age and paired phone.

No5Maker product pagesupport.apple.com/en-us/111852Read 10 October 2026Footnote 5 of the Apple Watch Ultra sheet: the ECG app is available on Apple Watch Series 4 or later, not including Apple Watch SE.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Blood oxygen sensingiBlood-oxygen sensing capability. App availability and medical status vary by market.

No14Reviewdcrainmaker.com/2022/12/apple-watch-se-2nd-gen-2022-in-depth-review.htmlRead 10 October 2026Review: no SpO2 sensor.15Maker product pagesupport.apple.com/en-us/120358Read 10 October 2026Blood Oxygen app is on Apple Watch Series 6 or later and all Ultra models. Footnote: not supported on Apple Watch SE.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Skin temperature sensingiA sensor or supported function that measures skin temperature. It is not a core-body thermometer.

No7Press releaseapple.com/newsroom/2025/09/apple-introduces-apple-watch-se-3Read 10 October 2026SE 3 adds wrist temperature sensing and a more advanced set of health features than the previous generation.14Reviewdcrainmaker.com/2022/12/apple-watch-se-2nd-gen-2022-in-depth-review.htmlRead 10 October 2026Review: no wrist temperature sensing, which the Series 8 has.16Maker product pagesupport.apple.com/en-us/102674Read 10 October 2026Wrist temperature needs Apple Watch Series 8 or later, any Ultra, or SE 3. The SE (2nd generation) is not listed.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Blood pressure featureiPublished blood-pressure feature category. Hypertension notifications are not numerical blood-pressure readings.

None25Spec databaseeverymac.com/systems/apple/apple-watch/specs/apple-watch-se-2-2022-gps-cellular-40mm-us-canada-a2726.htmlRead 10 October 2026EveryMac: the SE 2 does not support Hypertension notifications.

Hypertension notifications1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Body composition sensor

Not available

Not available

Skin conductance (EDA)

Not available

Not available

Medical clearancesiNamed regulatory clearances and their jurisdiction. General water resistance or an ECG sensor does not establish medical clearance.

Not available

Not available

Motion and environment sensors

3 of 9 differ

Accelerometer

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as High-g accelerometer

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Barometric altimeter

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026The sheet lists an always-on altimeter. Apple does not name the sensor type.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as Always-on altimeter

Compass

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Ambient light sensor

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Depth gauge

Not available

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Depth gauge rangeiPublished measurement range of the depth gauge, distinct from maximum diving depth and water-pressure resistance.

Not available

40m1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Water temperature sensor

Not available

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Health and fitness

3 of 5 differ

Health featuresiSupported health functions with country, phone and subscription restrictions in the source notes. Upcoming functions are not counted as available.

Heart rate alerts, Irregular rhythm notifications, Sleep tracking, Sleep stages, Noise monitoring1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Listed: high and low heart rate notifications and irregular rhythm notifications (not for people under 22 or previously diagnosed with AFib), Noise app, and Sleep app including sleep stages.

Continuous heart rate, Heart rate alerts, Irregular rhythm notifications, ECG app, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Sleep apnea notifications, Readiness score, Cycle tracking, Temperature-based ovulation, Hypertension notifications, Noise monitoring1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026temperature_based_ovulation from 'retrospective ovulation estimates' with the temperature sensor. readiness_score from the Readiness app

Fitness featuresiSupported workout functions. A sport-profile name alone does not prove advanced metrics such as running power or running dynamics. Trackback follows the recorded route back to the start. A compass arrow that points straight to the start does not count.

Training load, Running dynamics, Interval workouts, Pool swim, Open water swim, Trackback1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Listed: Custom workouts, Training load, stride length, ground contact time and vertical oscillation, Pool swim or open water swim, and Backtrack GPS data.

VO2 max, Training load, Running dynamics, Running power, Pool swim, Open water swim, Interval workouts, Route navigation, Trackback1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Maker confirms offline maps, custom routes and Backtrack, but the read spec does not explicitly establish turn-by-turn guidance. That unsupported feature member is removed.

Sport profilesiPublished count of distinct sport/activity profiles. A claim such as 180+ is not an exact integer count.

Not available

Not available

Dive modesiActual supported dive modes. Water resistance or a depth app alone does not establish decompression-capable scuba support.

Not available

Not available

External sensorsiTypes of external workout sensors the watch can pair with. GPS reception, phone data and built-in sensors do not qualify.

Heart rate strap, Power meter, Speed and cadence13Owner's manualsupport.apple.com/guide/watch/apd4cbc876c7/26/watchos/26Read 10 October 2026watchOS 26 cycling guide: Bluetooth cycling accessories such as power meters, speed sensors and cadence sensors connect automatically. The SE 2 sheet also lists connection to cycling accessories via Bluetooth. Heart rate strap: see the DC Rainmaker review. No ANT+ is claimed.14Reviewdcrainmaker.com/2022/12/apple-watch-se-2nd-gen-2022-in-depth-review.htmlRead 10 October 2026Review states a Bluetooth heart rate sensor can be paired in the Bluetooth settings (watchOS 9 at review time).

Power meter1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Bluetooth-compatible with power meters

Safety

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Fall detectioniAutomatic fall detection. Incident detection restricted to recorded workouts is not counted as general fall detection.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Safety list: Fall Detection.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Car crash detection

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Safety list: Crash Detection. Requires Apple Watch Series 7, SE, Ultra or later per footnote 4.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Emergency SOSiA manual emergency alert to emergency services or preset contacts. Source notes identify the recipient, paired-phone requirement and country limits. Satellite is listed separately.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Safety list: Emergency SOS. Needs a cellular connection or Wi-Fi calling from the watch or a nearby iPhone.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Emergency sireniPublished or measured siren sound level in decibels. Audible distance alone does not establish this value. Measurement distance belongs in source notes.

Not available

Not available

Live location sharingiShares live location during supported use. A paired phone or data subscription may be required.

Not available

Not available

Dedicated LED flashlightiA dedicated hardware LED flashlight. Lighting the display white is not counted.

Not available

Not available

Positioning

2 of 3 differ

PositioningiPublished satellite systems and signal bands. Do not infer bands from dual-frequency support alone.

L1 GPS, GNSS, Galileo, QZSS1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Connectivity: L1 GPS, GNSS, Galileo and QZSS, as published. Signal bands other than L1 are not named.

GPS (dual-frequency), Galileo, QZSS, BeiDou1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Published as Precision dual-frequency GPS (GPS, Galileo, QZSS, and BeiDou)

Dual-band GNSSiMaker-stated dual-frequency satellite reception. Supported constellations and signal bands are listed separately.

No1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Sheet lists L1 GPS only. The Ultra sheet lists L1 and L5 GPS for comparison.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Offline mapsiMap data stored on the watch and usable without live phone data. GPX routes or breadcrumb tracks alone are not offline maps.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Hiking list: offline maps with custom route creation.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Connectivity

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BluetoothiPublished Bluetooth support for this model. The version is recorded separately. Unknown version does not mean the radio is absent.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Not available

Bluetooth version

5.31Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

5.31Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Wi-FiiPublished Wi-Fi support for this model. The standard and bands are recorded separately. Unknown standard does not mean Wi-Fi is absent.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Not available

Wi-Fi standard

Wi-Fi 41Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Connectivity: Wi-Fi 4 (802.11n).

Wi-Fi 41Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Wi-Fi bands

2.4 GHz24Spec databasem.gsmarena.com/apple_watch_se_2-11865.phpRead 10 October 2026WLAN: Wi-Fi 802.11 b/g/n, no dual-band note. EveryMac and Vodafone state 2.4 GHz.25Spec databaseeverymac.com/systems/apple/apple-watch/specs/apple-watch-se-2-2022-gps-cellular-40mm-us-canada-a2726.htmlRead 10 October 2026All Apple Watch SE 2 models have built-in support for 802.11b/g/n 2.4 GHz and Bluetooth 5.3.26Retailer pagedeviceguides.vodafone.co.uk/apple/watch-se-2nd-gen-watchos-9/specificationsRead 10 October 2026802.11 b/g/n on the 2.4 GHz band.

2.4 GHz, 5 GHz1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

CellulariTrue when a cellular edition is sold. A variant row states whether that individual model has cellular hardware.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Sold as GPS and GPS + Cellular. Connectivity lists LTE and UMTS. Needs a carrier plan.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Network

LTE1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

LTE, 5G1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

4G bandsiPublished LTE bands for the stated regional cellular model. Do not transfer bands to another region or Wi-Fi-only model.

1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 6624Spec databasem.gsmarena.com/apple_watch_se_2-11865.phpRead 10 October 2026USA, LATAM, Canada models A2726 and A2727: 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66. The base value is the cellular reference model, as for the other cellular fields, and the GPS rows have no LTE. International, China and Hong Kong models (A2725, A2724, A2855, A2856) are not stored because GSMArena lists band 6 for them and EveryMac does not.25Spec databaseeverymac.com/systems/apple/apple-watch/specs/apple-watch-se-2-2022-gps-cellular-40mm-us-canada-a2726.htmlRead 10 October 2026A2726 LTE bands 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41 and 66. Not compatible with bands 8, 20 and 28. The A2727 page lists the same bands. The A2725, A2724 and A2856 pages list international bands 1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41 and 66, without band 6, so the international models are not stored.

1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71, 38, 39, 40, 41, 531Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026FDD-LTE 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71. TDD-LTE 38, 39, 40, 41, 53. Model A3579

5G bandsiPublished 5G NR bands for the stated regional cellular model. RedCap support does not establish conventional full-bandwidth phone 5G.

Not available

n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71, n38, n40, n41, n531Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026FDD-5G NR n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71. TDD-5G NR n38, n40, n41, n53. RedCap

NFCiSome regions sell an NFC edition, so it is per variant.

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Apple Pay is listed. NFC itself is not named.

Yes2Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026Apple Pay contactless payments

Contactless payments

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Payment services

Apple Pay1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Apple Pay1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Ultra-wideband

No17Maker product pagesupport.apple.com/en-us/109512Read 10 October 2026Apple's Ultra Wideband availability page lists the watches with a first or second generation chip: Series 6 and later and the Ultra models. No Apple Watch SE is listed.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Satellite

Not available

Emergency SOS, Messaging1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Satellite communications (Emergency SOS, Messages, Find My). Provided by Globalstar

ANT+

Not available

Not available

Audio

1 of 4 differ

Speaker

Yes1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Dual speakers

Microphones

11Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Hardware and Buttons lists one Microphone.

31Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Hardware/Audio section identifies the microphone, or the three-microphone array for Ultra 4.

Calls on the watchiVoice-call capability of the marketed model, including sold cellular editions. Variant radio capability and paired-phone requirements still apply.

Cellular or phone1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Cellular models call without the iPhone. The sheet lists Auto-Answer Calls and Wi-Fi calling for Emergency SOS.

Cellular or phone2Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026Text and talk over 5G without iPhone

Music on the watchiPlays audio stored on the watch. Remote control of phone playback or streaming alone does not qualify.

Yes9Owner's manualsupport.apple.com/guide/watch/add-music-apd483798d11/watchos/26Read 10 October 2026watchOS 26 guide: to play music when not connected to the internet, download it to the watch first.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Controls

3 of 5 differ

ButtonsiPhysical controls used to operate the watch, excluding the rotating crown and strap-release buttons. A clickable rotating crown is counted only in Crown.

11Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Hardware lists a Digital Crown and a side button. The crown is not counted.

21Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Action button and side button. Digital Crown not counted

Named operating buttonsiNames of operating buttons, excluding the crown and strap-release controls.

Side button1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Action button, Side button1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026User control buttons only. Digital Crown and band-release buttons excluded.

CrowniA crown that rotates to control the interface. A round push button that does not rotate is not a crown.

Rotating haptic1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Controls: Digital Crown with haptic feedback.

Rotating haptic1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Rotating bezeliPhysical rotation or touch gestures around the display edge. A fixed decorative bezel is None.

Not available

Not available

Gestures

Not available

Single tap, Double tap, Wrist flick1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Battery and charging

9 of 13 differ

Battery capacityiPublished battery capacity for the stated case size. Rated and typical capacity are distinguished in source notes.

245mAh24Spec databasem.gsmarena.com/apple_watch_se_2-11865.phpRead 10 October 2026Li-Ion 296 mAh, listed with the 44mm dimensions.26Retailer pagedeviceguides.vodafone.co.uk/apple/watch-se-2nd-gen-watchos-9/specificationsRead 10 October 2026Non-removable Li-Ion 245 mAh (40 mm) and 296 mAh (44 mm). The 40mm value matches the 3C filing figure in the iPhone Mania report.27Press articleiphone-mania.jp/news-486403/ampRead 10 October 2026Battery capacities from China 3C certification data, as reported via MySmartPrice: SE (2nd generation) 40mm 245 mAh and 44mm 296 mAh.28Retailer pageifixit.com/products/apple-watch-44-mm-se-and-series-5-replacement-batteryRead 10 October 202644 mm replacement battery A2181: 296 mAh, 1.129 Wh, 3.814 V. Listed as compatible with the SE 2 44 mm models A2727, A2724, A2856 and A2723. 296 mAh x 3.814 V = 1.129 Wh.

Not available

Claimed battery lifeiMaker endurance claims with distinct operating modes and case sizes. With solar describes augmentation of that estimate, not hardware capability. Use false for ordinary claims without solar augmentation, true for explicitly solar-aided claims, and omit it when solar qualification is unclear. Source notes state AOD, GNSS, music and solar conditions. Do not create a normal-use row from an AOD-only claim. Low power denotes the maker battery-saver mode. Keep its typical, light-use and always-on claims separate from standard-mode claims. GPS power saving identifies an intermediate reduced-accuracy GNSS saving preset. Source notes retain the maker's preset name and published conditions. Max battery GPS is the distinct maximum-saving claim. When the maker has only one GPS saving preset, it is GPS power saving.

AApple Watch SE 2

Mode	With solar	Hours (h)
Smartwatch	No	18

Source1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026All-day battery life, up to 18 hours of normal use. Footnote 2: 90 time checks, 90 notifications, 45 minutes of app use and a 60-minute workout with music over 18 hours. Apple testing in August 2022.

BApple Watch Ultra 4

Mode	With solar	Hours (h)
Smartwatch	No	50
Low power	No	84
GPS	No	18
Extended GPS workout	No	25
Max battery GPS	No	45

Source1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Power and Battery Life: normal workout 18 h, Extended Workout 25 h, Max Extended Workout 45 h. Footnote specifies outdoor run/walk/hike without iPhone and with HR on. These are not reviewer measurements.

Smartwatch mode (claimed)iMaker normal-use smartwatch claim without solar. A watch with only an explicit AOD-mode claim has no value here. Workloads differ and source notes must be read.

18h=CalculatedFrom Claimed battery life

50h=CalculatedFrom Claimed battery life

AOD battery life (up to)iMaker claimed smartwatch endurance with the always-on display enabled and without solar, for the base case. Source notes preserve workload and case conditions. This is a claim, not a measured test or an AOD-off estimate.

Not available

Not available

GPS mode (claimed)iMaker regular GPS/GNSS activity claim without solar, for the base case. AOD, multi-band, music and power-saving conditions have separate rows when published.

Not available

18h=CalculatedFrom Claimed battery life

Solar chargingiPublished solar charging hardware capability. An ordinary battery estimate without solar augmentation does not prove that the watch lacks solar charging hardware.

Not available

Not available

Charging methodiThe connection at the watch, not the cable end at the USB adapter. A proprietary inductive puck is not Qi unless interoperability is explicitly established.

Magnetic puck1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026In the box: Apple Watch Magnetic Charger to USB-C Cable.

Magnetic puck1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Charging guidanceiPublished charging requirements, nominal estimates and compatibility guidance. Keep adapter ratings separate from power accepted by the watch.

Apple measured charge times with the included Apple Watch Magnetic Charger to USB-C Cable (A2652) and an Apple 20W USB-C Power Adapter (A2305). The adapter is not in the box.1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

Not available

Max charging power (watch)iPublished maximum charging power at the watch. Adapter rating or charger input power does not prove the power accepted by the watch.

Not available

Not available

Fast chargingiAn explicit fast-charging capability claim. A short charging time or high adapter wattage alone does not qualify.

No7Press releaseapple.com/newsroom/2025/09/apple-introduces-apple-watch-se-3Read 10 October 2026SE 3 'features fast charging for the first time', so SE 2 has none.14Reviewdcrainmaker.com/2022/12/apple-watch-se-2nd-gen-2022-in-depth-review.htmlRead 10 October 2026Review: fast charging is not included on the SE (2022).18Maker product pagesupport.apple.com/en-us/102454Read 10 October 2026Fast charging is supported on Apple Watch Series 7 and later, SE 3 and Ultra and later. The SE (2nd generation) is not listed.

Yes1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Quick charge claimiMaker claim for usage from a short charge. Source notes identify the usage workload, such as normal use or sleep tracking.

Not available

Charge time15 minUse time18 h1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Power and Battery Life: normal-use hours from a short charge. Sleep-only charging claim is a different workload.

Charge 0 to 80% (claimed)iMaker claim for charging an empty battery to 80%. Charger and approximate qualifiers belong in source notes.

90min1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Up to 80% charge in about 1.5 hours. Footnote 3 gives the test conditions.

45min1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Power and Battery Life, charge footnote: included fast charger cable, Apple 20W USB-C power adapter. Approximate maker time.

Full charge time (claimed)iMaker advertised nominal full-charge duration. Approximate or theoretical maker estimates are allowed, with their conditions in source notes. Partial-charge intervals do not qualify. Measured 0 to 100% tests have a separate field.

Not available

75min10Maker product pageapple.com/uk/watch/batteryRead 30 September 2026Model-specific Charge section. Approximate claim, included fast charging cable with Apple 20W USB-C adapter. Series 12 says about one hour, SE 3 and Ultra 4 about 75 minutes.

Measured

1 of 4 differ

Peak brightness (measured)iReviewer measurement. Source notes state screen area, mode and ambient light. A small-area peak claim cannot be replaced with a full-screen measurement.

Not available

Not available

Battery life (measured)iReviewer-observed mixed-use endurance. Source notes state case size, AOD, workout use and whether it was a complete discharge. Extrapolation from partial discharge is excluded.

Not available

Not available

Battery tests (measured)iReviewer-observed endurance, with case size and test settings in source notes. Partial-discharge projections are not stored as measured endurance.

Not available

Not available

Full charge time (measured)iReviewer measurement from empty to full, not 0-80% or a charge from 5%. Source notes name the charger and case size.

Not available

105min13Reviewgigazine.net/gsc_news/en/20260927-apple-watch-ultra-4-reviewRead 8 October 2026Reviewer timed a 49 mm GPS+Cellular Ultra 4 in Japan from discharged 0% with the watch powered off to 100%, using the included charging cable and Apple 20 W USB-C power adapter. Published approximately 1 hour 45 minutes, exactly converted to 105 minutes with the approximate qualifier retained. Firmware, ambient temperature and optimized-charging settings are not stated. Asia-Pacific hardware is A3579 per Apple identification. This is an observed test sample, not the maker about 75 minute claim. Partial-discharge endurance observations in the review are excluded.

Strap

3 of 6 differ

Lug widthiDistance between standard strap attachment lugs, not the decorative width of a proprietary strap. Unknown for custom connectors unless the maker publishes lug width.

Not available

Not available

Quick-release strapiThe supplied strap can be detached through its quick-release mechanism. Compatibility with quick-release replacement straps alone does not qualify.

Yes19Maker product pagesupport.apple.com/en-us/108908Read 10 October 2026Hold down the band release button, then slide the band across to remove it.

Not available

Strap systemiPublished attachment system and compatible case sizes. Proprietary connectors are distinguished from standard spring bars.

Apple Watch proprietary slide-in band connector with a case-mounted band-release button. 40mm case: bands for 38mm, 40mm and 41mm cases. 44mm case: bands for 42mm, 44mm and 45mm cases.19Maker product pagesupport.apple.com/en-us/108908Read 10 October 2026Bands for 38mm, 40mm and 41mm cases are compatible with each other. Bands for 42mm, 44mm and 45mm cases are compatible with each other.

Not available

Strap materialiMaterial of the supplied strap for the stated package. Do not substitute material from another band sold separately.

Not available

Not available

Strap

Not available

Not available

Strap sizesiPublished wrist-circumference range for the stated strap or case. Source notes distinguish an overall compatible wrist range from one supplied strap size.

AApple Watch SE 2

Size	Wrist (min) (mm)	Wrist (max) (mm)
Overall compatible case wrist range, varies by band	130	200

Source1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Fits 130-200 mm wrists (40mm) and 140-245 mm wrists (44mm) across the bands that Apple sells.

BApple Watch Ultra 4

Wrist (min) (mm)	Wrist (max) (mm)
130	210

Source1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026Size and Weight: Fits stated wrist circumference. This is an overall case-compatible wrist range, not one supplied strap size. No maker size label is published.

Regulatory

None of 3 known

FCC ID

Not available

Not available

SAR limb (US)iPublished limb/wrist SAR for the stated base regional model under the US regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

Not available

Not available

SAR limb (EU)iPublished limb/wrist SAR for the stated base regional model under the EU regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

Not available

Not available

Other certifications

Not available

Not available

In the box

1 of 2 differ

In the box

Apple Watch SE, Band, Apple Watch Magnetic Charger to USB-C Cable (1m)1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026Apple Watch SE, band, charger cable.

Apple Watch Ultra 4, Band, Apple Watch Magnetic Fast Charger to USB-C Cable (1m)1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Power adapter in boxiA mains/USB power adapter is supplied. A charging cable, inductive puck or charging dock alone does not count.

No1Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

No1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026In the box lists only the charging cable

Links

Not compared

Product page

support.apple.com/en-us/1118531Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

www.apple.com/apple-watch-ultra-42Maker product pageapple.com/apple-watch-ultra-4Read 30 September 2026

Spec sheet

support.apple.com/en-us/1118531Maker product pagesupport.apple.com/en-us/111853Read 10 October 2026

www.apple.com/apple-watch-ultra-4/specs1Maker product pageapple.com/apple-watch-ultra-4/specsRead 30 September 2026

Manual

support.apple.com/en-gb/guide/watch/welcome/26/watchos/2612Owner's manualsupport.apple.com/guide/watch/apple-watch-models-apd2054d0d5b/26/watchos/26Read 10 October 2026watchOS 26 Apple Watch User Guide. Its Apple Watch models page lists Apple Watch SE (2nd generation). watchOS 27 does not support this model.

support.apple.com/en-gb/guide/watch/welcome/27/watchos/279Owner's manualsupport.apple.com/en-gb/guide/watch/welcome/27/watchos/27Read 30 September 2026watchOS 27 user guide. Models covered include this watch.

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

Not available

Warranty

0 of 1 differ

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.

1year23Maker product pageapple.com/legal/warranty/products/warranty-us.htmlRead 10 October 2026Apple Watch warranty, US: one (1) year limited warranty from the original retail purchase. Statutory consumer rights are separate.

1year6Maker product pageapple.com/legal/warranty/products/warranty-us.htmlRead 30 September 2026US: Apple One (1) Year Limited Warranty

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