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Amazon Basics 3-Button USB Wired Mouse vs Logitech MX Master 4

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Product A: Amazon Basics

3-Button USB Wired Mouse

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B

Product B: Logitech

MX Master 4

89 of 154 known

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Only differences

AAmazon Basics 3-Button USB Wired Mouse

BLogitech MX Master 4

General

6 of 9 differ

Series

Not available

MX Master1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026

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

MSU09391Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Item details: Model Number MSU0939 and Mfr Part Number MSU0939 for the 1-Pack. The 30-Pack has its own listing and is not a separate model here.

910-007558, 910-007559, 910-007560, 910-007562, 910-007563, MR01181Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026US shop lists 910-007558 Graphite, 910-007559 Pale Gray and 910-007560 Black. The en-gb, de-de and fr-fr shops list 910-007562 Graphite and 910-007563 Pale Gray. MX Master 4 for Mac (910-007574, 910-007575, 910-007576) and MX Master 4 for Business (910-007616, 910-007617) are sold under their own names and are left out.9Maker product pagesupport.logi.com/hc/en-150/articles/28321406604439-Specification-MX-Master-4Read 7 October 2026Exact consumer specification identifies mouse factory MR0118, distinct from included receiver. Existing sales codes retained.

GTIN / EAN

841710104400, 840095847179, 50500535574521Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Item details: UPC 841710104400 840095847179 and Global Trade Identification Number 05050053557452. The check digits of all three are valid. The 14-digit GTIN is stored as the 13-digit EAN 5050053557452. Amazon UK shows the same three numbers for ASIN B005EJH6RW. The listing does not say which pack or market carries which number.

097855207524, 097855207579, 5099206133082, 509920613309911Maker spec sheet (PDF)static.pcrichard.com/docs/910-007560_Specifications-Sheet_01.pdfRead 7 October 2026Logitech-authored consumer sheet on PC Richard, page 2 exact Black 910-007560 identifies barcode 097855207524. Printed label EAN-13 accompanies a 12-digit UPC, retained exactly. Carton SCC-14 excluded.12Retailer pagemicrocenter.com/product/700886/logitech-mx-master-4-pale-gryRead 7 October 2026Exact Pale Gray 910-007559 Product Information row: UPC 097855207579. Other configurations excluded.13Retailer pagemedia.softexpress.de/media/product/datasheet/KS21308131.PDFRead 7 October 2026SoftExpress supplier sheet exact Graphite 910-007562: EAN/UPC 5099206133082. Retailer-authored 1WorldSync sheet, not maker PDF.14Retailer pageeetgroup.com/en-eu/910-007563-logitech-mx-master-4-grey-wid-w129275922Read 7 October 2026EET exact MPN 910-007563 row: EAN/UPC 5099206133099. Public EU distributor page independently readable. No other generic or incorrect technical rows transferred.

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

Not available

30 September 20252Press releasenews.logitech.com/press-releases/news-details/2025/Remastering-an-Icon-Introducing-Logitech-MX-Master-4/default.aspxRead 6 October 2026Logitech launch release dated 30 September 2025. It says the colours will be available and gives no shipping date.

Status

Available1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Amazon.com lists the black 1-Pack as buyable on 2026-10-14 and shows 10K+ bought in the past month. Amazon is the maker and seller of the Amazon Basics line.

Available1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026US, UK and German shops list the SKUs as in stock 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

Logitech MX Master 3S3Press articlenotebookcheck.net/Logitech-MX-Master-4-receives-global-release-with-for-Mac-and-for-Business-options-offered-at-launch.1127951.0.htmlRead 6 October 2026Logitech has finally released the successor to the MX Master 3S.

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.

Not available

$119.992Press releasenews.logitech.com/press-releases/news-details/2025/Remastering-an-Icon-Introducing-Logitech-MX-Master-4/default.aspxRead 6 October 2026Priced at $119.99/€129.99. Same price for MX Master 4 and MX Master 4 for Mac.

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

€129.992Press releasenews.logitech.com/press-releases/news-details/2025/Remastering-an-Icon-Introducing-Logitech-MX-Master-4/default.aspxRead 6 October 2026€129.99 as published in the launch release. The de-de and fr-fr shops list 129.99 EUR including VAT.

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

US1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Amazon.com listing. The manual also names EU and UK importers, but the launch market is stored as US only.

US, EU, GB1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026US shop sells 910-007558, 910-007559 and 910-007560. UK, German and French shops sell 910-007562 and 910-007563.

ColoursiThe maker's own colour names

Black1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026The listing offers Black only for the 1-Pack and the 30-Pack.

Graphite, Pale Gray, Black1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Maker colour labels as on the US shop: Graphite, Pale Gray, Black. The launch release writes Pale Grey and also names a Graphite Charcoal colour for North America and Europe. No shop SKU with that name was found.

Segment

Office5Reviewrtings.com/mouse/reviews/amazonbasics/3-button-usb-wired-mouseRead 21 October 2026Public review text: a straightforward, wired office mouse. RTINGS reviewed it on 2022-10-04. Only the public text was used. The test results are members-only.

Office2Press releasenews.logitech.com/press-releases/news-details/2025/Remastering-an-Icon-Introducing-Logitech-MX-Master-4/default.aspxRead 6 October 2026Release: designed to empower creative professionals, developers and business users. Sold in the MX productivity line, not as a gaming mouse.

Mouse type

Standard2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026The product description figure shows a conventional mouse with a scroll wheel. No trackball and no vertical body.

Standard6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Standard palm mouse, not vertical or trackball.

Shape

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Body shapeiDescribes shell symmetry, not the intended hand. Symmetrical with side buttons on one side differs from an asymmetric right-handed body. Ambidextrous means a symmetrical body with side buttons on both sides.

Symmetrical body1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Features and specs: Hand Orientation Ambidextrous. The manual figure shows a symmetrical body with no side buttons, so it is stored as symmetrical.2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026The product description figure shows a symmetrical body with no side buttons. The leaflet names no handedness.

Asymmetric, right-handed5Reviewmacworld.com/article/2928916/logitech-mx-master-4-mouse-review.htmlRead 6 October 2026Review dated 4 October 2025 notes right-handed only, with no left-handed model. Maker gallery images show the asymmetric body with a left thumb rest.

Maker size classiThe maker’s marketed size label. Do not infer a size class from dimensions or reviewer hand-fit recommendations.

Not available

Not available

Recommended gripsiGrip styles explicitly recommended by the maker. A reviewer finding a grip usable does not add a maker recommendation.

Not available

Not available

Recommended hand sizeiMaker recommendation, measured from wrist to middle fingertip for hand length. Source notes specify whether limits are inclusive or exclusive.

Not available

Not available

Hump positioniPosition of the shell’s highest point along its length, from a maker drawing or exact-model review.

Not available

Not available

Thumb rest

Not available

Yes3Press articlenotebookcheck.net/Logitech-MX-Master-4-receives-global-release-with-for-Mac-and-for-Business-options-offered-at-launch.1127951.0.htmlRead 6 October 2026Actions Ring button sits within the MX Master 4's thumb rest.

Ring or pinky finger rest

Not available

No15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact mouse table Pinky Rest No. Thumb rest is a separate existing field.

Upper shelliThe primary hand-contact shell. An open or perforated bottom alone does not make the upper shell perforated.

Not available

Solid6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Review and maker images show a solid upper shell.

Swappable parts

Not available

Not available

Adjustable weight

Not available

Not available

Maximum added weightiTotal removable weight supplied with the mouse, excluding the mouse’s normal weight.

Not available

Not available

Vertical angle

Not available

Not available

Trackball diameter

Not available

Not available

Trackball position

Not available

Not available

Dimensions and weight

4 of 5 differ

Mouse body dimensionsiLength from front to rear, width at the widest body point, and maximum height. Cable and receiver are excluded. Approximate maker figures are qualified in source notes. Logitech pages often label the front-to-rear length Height and the body height Depth, so map the figures by size.

Length109Maximum width61Maximum height35.56mm(4.3 × 2.4 × 1.4 in)1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Bullet: Product Dimensions 4.3 x 2.4 x 1.4 inches (LxWxH) with 4.9-foot cable. A listing feature image gives 4.3 in / 10.9 cm length and 2.4 in / 6.1 cm width. Length and width store the centimetre figures. Height is 1.4 in converted exactly. All are rounded maker figures. The cable is not part of the body size. Amazon UK gives 10.9 x 6.1 x 3.4 cm in its bullet and 4.3 x 2.4 x 1.25 in in its description, so the maker's height differs by listing (34 mm and 31.75 mm against 35.56 mm). The US figure stays because it is the one on the listing that names the cable.2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026

Length128.15Maximum width88.35Maximum height50.8mm(5 × 3.5 × 2 in)1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane labels 128.15 mm as Height, 88.35 mm as Width and 50.8 mm as Depth. The MX Master 4 for Business page labels the same body 50.8 mm Height and 128.2 mm Depth, so 128.15 mm is the front-to-rear length and 50.8 mm the height.

Grip widthiBody width where the thumb and opposite grip finger sit. This differs from maximum body width.

Not available

62mm15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact mouse Ergonomics Grip Width row: 62 mm, distinct from widest width 88 mm. Software 1.94.767601, firmware 27.0.15, receiver 5.4.26 revision 3. Colour unstated.

Mouse weight (claimed)iWireless mice include the battery. When the maker does not say whether a removable battery is in the weight, the published weight is stored and the source note says so. Wired mice exclude the cable. Source notes identify installed skates, colour, approximation, tolerance or a published bound.

80g(2.8 oz)1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Item details: Item Weight 0.08 kg, published rounded to 0.01 kg. The listing does not say whether the cable is included. Some resellers copy 2.89 oz (about 82 g) and qualescegliere.it lists 76.55 g without a method, so 80 g is the published figure only.

150g(5.3 oz)1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: 150 g (5.29 oz). Battery is built in.

Box dimensions

Not available

Width141Height167Depth58mm(5.6 × 6.6 × 2.3 in)9Maker product pagesupport.logi.com/hc/en-150/articles/28321406604439-Specification-MX-Master-4Read 7 October 2026Exact consumer Retail Box row labels Height 167 mm, Width 141 mm and Depth 58 mm. Printed source axes retained, no body-axis mapping or shipper dimensions.

Packed weightiMouse, packaging and included accessories. Shipping-service weight is not evidence of packed weight.

Not available

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Sensor

8 of 20 differ

Marketed sensor nameiMaker’s sensor branding, or reviewer identification when the maker does not publish one. The physical part number is recorded separately.

Not available

Darkfield high precision1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: Sensor Technology, Darkfield high precision.

Published sensor brandiSensor brand or trademark named by the source, which may be the mouse maker’s proprietary branding. Physical silicon manufacturer and part number are separate facts.

Not available

Logitech1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text calls it Logitech's most accurate sensor ever. Physical sensor part is not published.

Physical sensor part numberiExact physical sensor family or part identified by the maker or an exact-model reviewer. Do not infer it from DPI, speed or a sibling mouse.

Not available

PAW3826E117Reviewweistang.com/thread-125248-1-1.htmlRead 7 October 2026Original Wai She Tang photographic review published October 30 2025. PCB photograph DSC_2504.JPG is captioned PixArt PAW3826E1 laser sensor. This is the actual standard MX Master 4 component, not inferred from sibling compatibility. Sohu republication is November 4 2025.

Sensor type

Optical1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Features and specs: Movement Detection Optical. Bullet: high-definition (1000 dpi) optical tracking. The sensor brand and part are not published.

Laser18Maker product pagelogitech.com/en-us/products/mice/mx-master-4-business.htmlRead 7 October 2026Business page explicitly calls 8K DPI Darkfield sensor laser. Hardware linkage: consumer support and Business hub both factory MR0118, same Darkfield 200-8000 DPI, dimensions and 150 g. Main approved transfer of intrinsic sensor type only. No Business software, warranty or bundle inherited.20Maker product pagehub.sync.logitech.com/mx-master-4/post/specifications---mx-master-4-56yxP4pGopsEsxBRead 7 October 2026Business hub expressly factory MR0118, same Darkfield high precision 200-8000 DPI, body and weight as exact consumer MR0118 specification. This is hardware linkage, not Business SKU inclusion.

Maximum configurable DPIiMaximum selectable DPI with the documented firmware. Later firmware increases are noted in sources. The sensor chip’s theoretical maximum is not the mouse’s maximum.

1,000DPI1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Features and specs: Mouse Maximum Sensitivity 1000 dots per inch. Bullet: 1000 dpi optical tracking. The mouse has no DPI button, so 1000 is its only documented resolution.

8,000DPI1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: DPI (Minimal and maximal value) 200-8000.

Minimum configurable DPIiLowest selectable sensitivity on this mouse. Factory presets do not establish its minimum.

1,000DPI1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Bullet: 1000 dpi optical tracking, the only resolution Amazon states. The mouse has no DPI button and no software, so 1000 is both minimum and maximum.

200DPI1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026

DPI adjustment stepiSmallest documented configuration increment, not the spacing between factory presets.

Not available

50DPI1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: can be set in increments of 50 DPI.

Maximum DPI stagesiMaximum number of selectable sensitivity presets saved at once, not the number of distinct supported DPI values.

Not available

Not available

Default DPI presetsiFactory preset sensitivity values for the exact model and firmware. Source notes distinguish different factory profiles.

1,000DPI1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Same bullet. A single fixed 1000 dpi, so it is the only out-of-the-box value.

1,000DPI1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: Nominal value 1000. The mouse has no DPI button, so this is the single default sensitivity.

Separate X and Y DPI

Not available

Not available

Tracking speed (claimed)iMaker or published product specification, in inches per second. If the source says more than a value, that numeric threshold is stored and qualified in the source note. Do not read it as an exact ceiling.

Not available

Not available

Tracking acceleration (claimed)iMaximum tracking acceleration in multiples of gravitational acceleration, not mouse weight. A source saying more than a value is retained as a qualified threshold in the source note.

Not available

Not available

Lift-off distance settingsiOnly documented selectable lift-off values, or one documented fixed value. A minimum, approximate measured result or unquantified range does not establish a complete option list.

Not available

Not available

Separate lift and landing distance

Not available

Not available

Surface calibrationiSensor calibration for a tracking surface. Adjustable lift-off distance or copying sensitivity from another mouse alone does not establish this feature.

Not available

Not available

Motion SynciWhether sensor motion synchronization is supported. Polling-rate restrictions and default state belong in source notes.

Not available

Not available

Angle snapping

Not available

Not available

Ripple control

Not available

Not available

Tracks on glass

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Notice in the operation section: the product does not work on glass surfaces.

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: tracks on virtually any surface, even glass, with a 4 mm minimum glass thickness.

Sensor position

Not available

Not available

Performance

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Documented polling rates by connectioniOne row per documented usable rate and connection. Receiver and firmware requirements are noted. Maximum-only claims do not imply all intermediate settings or the same ceiling over USB.

AAmazon Basics 3-Button USB Wired Mouse

Not available

BLogitech MX Master 4

Data connection	Polling rate (Hz)	Receiver requirement
2.4 GHz	125	Included Logi Bolt USB-C receiver
Bluetooth	125	Not available

Source7Reviewstuff.co.za/2026/01/27/logitech-mx-master-4-reviewRead 6 October 2026Existing receiver row: exact review says polling rate tops out at 125 Hz. BGR also states 125 Hz. The added Bluetooth 125 Hz row is independently established by the current exact consumer maker support table, cited separately.9Maker product pagesupport.logi.com/hc/en-150/articles/28321406604439-Specification-MX-Master-4Read 7 October 2026Exact consumer Bluetooth Report Rate row explicitly 125 Hz (8 ms). New Bluetooth row only. USB Speed 125 Hz is the wireless receiver path, not wired charging-cable input.

Max polling rate

Not available

125Hz=CalculatedFrom Documented polling rates by connection

Polling rate (wired)

Not available

Not available

Polling rate (2.4 GHz)

Not available

125Hz=CalculatedFrom Documented polling rates by connection

Polling rate (Bluetooth)

Not available

125Hz=CalculatedFrom Documented polling rates by connection

Claimed click latencyiAbsolute click-latency claim from the maker. A relative improvement is not absolute latency. Source notes give polling mode and whether the number is an average, bound or best case.

Not available

Not available

Adjustable debounce

Not available

Not available

Minimum debounceiLowest documented debounce setting or fixed main-switch debounce delay. Click response time or total click latency is not the same quantity.

Not available

Not available

Measured

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Latency per connection (measured)iReviewer measurements for an identified connection, polling rate, firmware and settings. Click and sensor latency use different test methods and are not interchangeable.

Not available

Not available

DPI deviation (measured)iReviewer measurement of deviation from a specified DPI value. Test DPI, travel speed, distance and method belong in source notes.

Not available

Not available

Lift-off distance (measured)iReviewer-measured lift-off height at the lowest setting, on the specified surface. Do not store the maker’s selectable LOD here.

Not available

Not available

Main click force (measured)iReviewer-measured main-button actuation force in gram-force. Not the mouse weight and not an electrical latency measure.

Not available

Not available

Weight (measured)iReviewer scale measurement. Include battery for wireless mice and exclude cable for wired mice. Source notes identify colour and installed skates.

Not available

152g(5.4 oz)6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Review published 9 November 2025: 152 g on the reviewer's scales. Colour and skates as shipped. Colour not stated.

Battery life (measured)iReviewer-measured runtime from a stated test, not a claim, forecast or extrapolation. Polling, lighting and other power settings must be identified.

Not available

Not available

Hand size fitiExact-model reviewer fit assessment. Source notes define the hand-length bands and tested grip. Do not translate general praise into every size fitting.

Not available

Not available

Switches

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Main switch typeiActuation technology for the left and right main buttons. Hybrid means optical-mechanical. Inductive analog switches detect travel by induction.

Not available

Mechanical15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact Click Tactility Switch Type table: Mechanical. Quiet/damped clicks alone not used to infer actuation technology.

Published main-switch brandiBrand named for the main switches. Proprietary Razer, Pulsar, Glorious or Logitech branding does not identify the physical contract manufacturer.

Not available

Not available

Main switch model

Not available

Not available

Main switch rated lifeiManufacturer or component rating for the main left/right switches, in millions of actuations. This is not a whole-mouse durability measurement.

Not available

Not available

Hot-swap main switchesiMain switches can be changed without soldering. Opening the case or using a switch pack can still be required.

Not available

No15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact Click Tactility Hot Swappable row: No. Independently corroborated by actual Galaxus desoldering procedure.16Reviewgalaxus.ch/en/page/how-to-give-your-mx-master-that-certain-click-41114Read 7 October 2026Actual author disassembles MX Master 4 and instructs desoldering old main switches, then soldering replacements. No solder-free hot-swap. Aftermarket replacement switch brands/ratings excluded.

Adjustable click actuationiThe point where a main click registers can be configured. Debounce adjustment changes timing, not actuation travel.

Not available

Not available

Separate main buttons

Not available

Yes17Reviewweistang.com/thread-125248-1-1.htmlRead 7 October 2026Original review body paragraph describes two translucent matte plastic main-button cover plates separately from the one-piece rear shell. Separate main plates, not simply two electrical switches.

Side switch model

Not available

Not available

Middle click switch

Not available

Not available

Scroll encoder type

Not available

Magnetic17Reviewweistang.com/thread-125248-1-1.htmlRead 7 October 2026Original teardown DSC_2491.JPG caption identifies the magnetic-induction conversion chip beneath glue on the MagSpeed wheel-driver board. This corroborates encoder transduction, separately from the EPM ratchet-control description.27Spec databaseeloshapes.com/mouse/compareRead 7 October 2026Exact MX Master 4 encoder row explicitly magnetic. Own Wai She Tang teardown caption also describes magnetic-induction conversion chip beneath MagSpeed wheel-driver-board glue. Encoder transduction, not merely magnetic ratchet switching. Physical encoder model not published. EloShapes wired-operation row conflicts with actual charging-only maker scope and is excluded.

Scroll encoder

Not available

Not available

Buttons and scroll wheel

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Physical button inputsiIncludes left/right, wheel click, each wheel-tilt direction, DPI/report-rate/profile buttons and a wheel-mode pushbutton. Excludes scroll rotation, power sliders and connection sliders. A connection pushbutton, such as Logitech Easy-Switch, counts even when the maker's own count leaves it out. A button that only switches power does not. Counts each physical input once.

31Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Features and specs: Button Quantity 3. Bullet: 3 buttons. The manual lists left button, right button and scroll wheel with click.2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Operation: left button (A), right button (C) and scroll wheel (B) with click. Three physical inputs.

96Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Maker specs list 8 buttons: left, right, middle click, wheel mode shift, back, forward, gesture and the Actions Ring thumb panel. The review and the maker bottom image add the Easy-Switch button on the underside. The bottom power control is a slide switch and is not counted.

Programmable buttonsiNumber of physical button inputs that can be remapped. Excludes scroll-up/down actions, alternate software layers and non-programmable mode controls.

05Reviewrtings.com/mouse/reviews/amazonbasics/3-button-usb-wired-mouseRead 21 October 2026Public review text: no button can be reprogrammed because there is no software.

Not available

Side buttonsiButtons on the thumb-facing side walls, including a side DPI-shift button. Top buttons beside the main click plate and bottom setting buttons are excluded.

02Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026The complete product description lists left button, scroll wheel, right button, USB cable and plug and sensor. No side buttons.

43Press articlenotebookcheck.net/Logitech-MX-Master-4-receives-global-release-with-for-Mac-and-for-Business-options-offered-at-launch.1127951.0.htmlRead 6 October 2026Actions Ring button in the thumb rest plus a third configurable side button next to back and forward. The maker side-profile gallery image shows the three side buttons and the thumb-rest panel on the left side.

Side buttons on

Not available

Left3Press articlenotebookcheck.net/Logitech-MX-Master-4-receives-global-release-with-for-Mac-and-for-Business-options-offered-at-launch.1127951.0.htmlRead 6 October 2026All side controls are on the left thumb side of the right-handed body.

DPI buttoniA physical pushbutton that changes sensitivity. A button shared with power or report rate still counts. Software-only switching does not.

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Same complete product description. No DPI button.

No6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Full layout in the review and the maker gallery images shows no DPI, profile or DPI-shift button.

DPI button position

Not available

Not available

Profile buttoniA dedicated physical profile-switch button. A remappable input that could be assigned this action does not prove a dedicated control.

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Same complete product description. No profile button.

No6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026

Dedicated DPI-shift buttoniDedicated physical control for temporarily switching sensitivity while held. A software-remappable input is not automatically a dedicated sniper control.

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Same complete product description. No dedicated DPI-shift button.

No6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026

Dedicated gesture buttoniA dedicated physical gesture control. Assigning a gesture action to a remappable button does not establish a separate gesture button.

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Same complete product description. No gesture button.

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: Gesture button, Yes.

Scroll wheel

Notched5Reviewrtings.com/mouse/reviews/amazonbasics/3-button-usb-wired-mouseRead 21 October 2026Public review text: the scroll wheel lacks left and right tilt and does not unlock for free scrolling. A wheel that cannot free-spin is stored as notched.

Notched, Free spin1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: ratchet mode and hyper-fast mode on the MagSpeed wheel. No wheel tilt is listed.

Scroll mode switchiHow the wheel changes between notched and free-spin modes. None means there is no such mode-switch mechanism.

None5Reviewrtings.com/mouse/reviews/amazonbasics/3-button-usb-wired-mouseRead 21 October 2026Public review text: the wheel does not unlock for free scrolling. No button or automatic mode switch exists.

Automatic1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: MagSpeed wheel with smart shift. TechRadar: the switching is automatic, and the button behind the wheel locks one mode.

Separate thumb wheeliA separate side wheel operated by the thumb. Tilting the central scroll wheel does not count.

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Same complete product description. No separate thumb wheel.

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: Thumb wheel, Yes, same as horizontal scroll.

Scroll wheel material

Not available

Metal1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: the machined steel wheel. The low-carbon aluminium part is the thumb wheel.

Build

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Shell material

Plastic, polymer unspecified1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Features and specs: Enclosure Material Plastic. No polymer type is named.

ABS9Maker product pagesupport.logi.com/hc/en-150/articles/28321406604439-Specification-MX-Master-4Read 7 October 2026Exact consumer Materials used row states PCR ABS, refining generic plastic. Recycled fraction does not identify every grip coating as ABS.

Surface finishiPublished surface finish, such as matte or textured. Soft-feel wording does not establish rubber material or a chemical coating.

Not available

Textured7Reviewstuff.co.za/2026/01/27/logitech-mx-master-4-reviewRead 6 October 2026Review: rubbery coating replaced with a plastic textured shell. Smartprix's review also describes textured hard plastic. The maker only says improved stain resistance.

Installed feet materialiMaterial of the factory-installed skates, excluding separately supplied replacements or dot skates. Virgin PTFE means additive-free or explicitly virgin-grade PTFE.

Not available

PTFE15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact own mouse Construction Feet Materials row: PTFE. No virgin PTFE grade inferred.

Installed skate piecesiNumber of separate factory-installed skate pieces, including a sensor ring. Excludes spare skates supplied in the box.

Not available

36Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Review: three black pads on the underside. Maker bottom gallery image shows three separate pads.

Feet shapeiGeometry of the installed skates. Pads plus a sensor ring are mixed. Separate dots are dots.

Not available

Pads6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Three flat pads, no sensor ring.

Feet thickness

Not available

Not available

Cable

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Cable

Not available

Not available

Cable length

1.5m1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Listing feature image: 4.9 ft / 1.5 m cable length. Bullet: 4.9-foot cable.

Not available

Detachable cableiThe cable unplugs from an external socket on the mouse without opening it. A service-replaceable internal cable does not count.

No2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026The product description labels one USB cable and plug. The figure and the listing photos show the cable running into the body with no socket.

Yes15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact mouse Connectivity table Detachable Cable Yes, mouse-side USB Type-C. Applies to a separately supplied charging cable, no cable bundled or wired data operation implied.

Port on mouseiExternally accessible data/charging socket on the mouse. A fixed cable is none. USB-C describes the connector, not a transfer-speed version.

None2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026The product description and the listing photos show no USB or charging socket on the mouse. The cable is fixed.

USB-C1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026USB-C charging socket. No cable is in the box.

Cable host plugiConnector on the computer end of the supplied or fixed cable, independent of the mouse-end connector.

USB-A1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Bullet: USB-A wired connection. An adapter is needed if the host only has USB-C.2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Symbol table and figure show a USB plug on the cable. The listing names it USB-A.

Not available

Connectivity

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ConnectionsiConnections that carry mouse input data. A USB cable used only for charging does not establish wired USB operation.

USB (wired)1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Features and specs: Connectivity Technology Wired. Bullet: USB-A wired connection.2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Specifications: USB compatibility 1.1, 2.0, 3.0 through the attached USB cable. No wireless part is listed.

2.4 GHz, Bluetooth8Reviewbgr.com/2041897/logitech-mx-master-4-reviewRead 6 October 2026Review: connects through either a Logi Bolt USB receiver or Bluetooth. The maker lists Connection Type Wireless. The USB-C cable is for charging only, so wired USB is not listed.

Wireless technology

Not available

Logi Bolt2Press releasenews.logitech.com/press-releases/news-details/2025/Remastering-an-Icon-Introducing-Logitech-MX-Master-4/default.aspxRead 6 October 2026Release and shop name the receiver Logi Bolt.

BluetoothiThe version number only, such as 5.1. LE and Low Energy are left out. A source that names only Bluetooth Low Energy gives no version.

Not available

5.11Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: Bluetooth Low Energy (BLE) 5.1.

Saved Bluetooth pairing slotsiNumber of Bluetooth hosts whose pairing the mouse remembers. A limit of one concurrently connected host does not establish the number of saved slots.

Not available

324Maker product pagesupport.logi.com/hc/en-ca/articles/28321445268247-Getting-Started-MX-Master-4Read 8 October 2026Exact consumer Easy-Switch guide says pair up to three different computers, then gives Bluetooth pairing for the selected channel. Stored saved Bluetooth host capacity, not three concurrent links. Ignore template typo keyboard and Unifying in receiver instruction.

Switchable host devicesiNumber of host devices selectable through the documented mouse controls without manually moving a data cable. Not the number of physical receivers or simultaneous active links alone.

Not available

31Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: connect with up to three devices and switch with Actions Ring or Easy-Switch buttons.

Device switching

Not available

Button6Reviewtechradar.com/computing/mice/logitech-mx-master-4Read 6 October 2026Review: a quick-switch button on the underside moves between connected computers.

Receiver host connectoriHost plug on the included small receiver. A larger cabled receiver is described in source notes. This differs from the charging cable’s plug.

Not available

USB-C1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Box lists a USB-C Bolt receiver. The mouse also pairs with older USB-A Bolt receivers, which are not included.

Receiver storage in mouse

Not available

No7Reviewstuff.co.za/2026/01/27/logitech-mx-master-4-reviewRead 6 October 2026Review: there isn't anywhere for you to store the dongle in the mouse.

Receiver extender includediAn included adapter, dock or cabled receiver arrangement moves the receiver closer to the mouse. A charging-only adapter does not count.

Not available

No1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026The complete box list has no adapter or extension cable.

Receiver pairing sharediA receiver can pair with another supported device, such as a keyboard, at the same time. This does not mean the mouse switches between computers.

Not available

Yes25Maker spec sheet (PDF)logitech.com/content/dam/logitech/en/business/pdf/logi-bolt-usb-c-receiver-whitepaper.pdfRead 7 October 2026Official exact Logi Bolt USB-C receiver whitepaper says six compatible devices can pair, with three simultaneous active connections. Consumer stock box includes that USB-C Bolt receiver. Not six simultaneous active connections or six mouse host slots.

Wireless rangeiPublished range and test conditions. A recommended receiver distance or minimum reliable range is not an exact maximum.

Not available

10m1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: 33-ft (10 m).

Basic mouse OS supportiOperating systems supported for basic input. Configuration software support is listed separately and may require a newer OS version.

Windows, macOS1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Bullet: Compatible with Windows and Mac OS. The manual lists Windows 7/8/10 and Mac OS. No macOS version is stated.2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Specifications: OS compatibility Windows 7/8/10, Mac OS.

Windows, macOS, Linux, ChromeOS, iPadOS, Android1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026System requirements: Windows, macOS, Linux, ChromeOS, iPadOS 15 or later and Android 12 or later over Bluetooth. Linux, ChromeOS, iPadOS and Android get basic functions without software.

ConsolesiConsole families explicitly supported. Source notes identify exact consoles, games and reduced polling or software functions.

Not available

Not available

Battery

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Battery type

Not available

Li-Po19Maker spec sheet (PDF)logitech.com/content/dam/logitech/en/business/pdf/mx-master-4-business-datasheet.pdfRead 7 October 2026Business datasheet explicitly USB-C rechargeable Li-Po (650 mAh). Exact shared MR0118 hardware and matching genuine battery part 533-R00250/650 mAh bridges consumer US sales SKUs. Main approved intrinsic chemistry only. Conflicting older consumer sheet 500 mAh kept external, current maker capacity retained.20Maker product pagehub.sync.logitech.com/mx-master-4/post/specifications---mx-master-4-56yxP4pGopsEsxBRead 7 October 2026Business hub MR0118 650 mAh battery matches exact consumer support and genuine consumer replacement part. No Business battery-policy or warranty inherited.21Retailer pageifixit.com/products/logitech-mx-master-4-battery-genuineRead 7 October 2026Genuine consumer component bridge: part 533-R00250, battery 642733, 650 mAh, explicitly covers MR0118 and three consumer US sales codes. Chemistry supplied by matching maker Business datasheet, not inferred from battery handling boilerplate.

Disposable battery countiNumber of disposable cells, such as AA or AAA. Do not use this field for internal rechargeable cells.

Not available

Not available

Battery capacityiPublished or physically identified internal battery capacity. Do not calculate mAh from claimed runtime or compare capacities across unverified hardware revisions.

Not available

650mAh1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Specs pane: Rechargeable 650 mAh.

User-replaceable batteryiBattery replacement is a supported user procedure. The ability to open and modify the mouse does not establish this feature.

Not available

Yes21Retailer pageifixit.com/products/logitech-mx-master-4-battery-genuineRead 7 October 2026Official Logitech partner sells genuine part or Fix Kit 533-R00250, expressly compatible with consumer 910-007558, 910-007559, 910-007560 and MR0118. Exact full replacement procedure linked. Supports user service with tools/disassembly, not tool-free or hot-swap.22Owner's manualifixit.com/Guide/Logitech+MX+Master+4+Battery+Replacement/193900Read 7 October 2026Maker-endorsed genuine-kit page links this exact consumer replacement guide. Steps 2 and 6 use a Phillips screwdriver to remove six case screws and three battery screws. Step 7 lifts out the battery and seats the replacement connector in its socket. Supported user procedure with tools and disassembly, not tool-free replacement.23Maker product pagelogitech.com/blog/2026/07/30/five-million-steps-toward-a-repairable-futureRead 7 October 2026July 30 2026 maker repair expansion explicitly names MX Master 4 battery coverage and iFixit genuine parts/guides. Main directed true under supported-service definition. Older consumer spec No is retained as temporal/meaning conflict in report.

Battery life by mode (claimed)iOne manufacturer or published product claim per documented connection, polling rate and lighting condition. Omit unstated conditions. Source notes identify performance, switch and haptic modes and whether runtime is up to a value.

Not available

Not available

Battery life (up to)iManufacturer estimate of days of normal use between full charges. This includes periods when the mouse is idle. It is not continuous runtime. Source notes preserve usage conditions and qualifiers when published. Do not convert this estimate to continuous hours.

Not available

70days24Maker product pagesupport.logi.com/hc/en-ca/articles/28321445268247-Getting-Started-MX-Master-4Read 8 October 2026Battery / Recharge section: a full charge can last up to 70 days depending on mouse use. Battery life varies with user and operating conditions. This is the advertised normal-use calendar estimate, not continuous runtime. Daily hours, connection, polling rate and firmware are unspecified. Haptic feedback settings are unspecified.

Battery life (normal use)iManufacturer estimate of calendar months of normal use between charges or battery replacements. It is not continuous runtime. Source notes retain approximate, up-to, or-more and operating-mode qualifiers. Do not convert this estimate to continuous hours.

Not available

Not available

Longest battery life

Not available

Not available

Battery life at 1000 HziLongest stored claim explicitly at 1000 Hz over 2.4 GHz. A claim without a confirmed polling rate is excluded.

Not available

Not available

Battery life on Bluetooth

Not available

Not available

Charging port

Not available

USB-C1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: USB-C quick charging. Charging cable not included.

Full charge timeiClaimed time from empty to full charge, in minutes. Approximation and charging setup are stated in source notes.

Not available

Not available

Quick charge

Not available

Charge time1 minUse time3 h1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: three hours of use from a one-minute quick charge.

Use while chargingiMouse input works while the internal battery charges through the documented wired or dock arrangement.

Not available

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: Simply plug in and keep working.

Charging system compatibilityiNamed wireless charging pad or contact dock. Source notes distinguish inductive pads from pogo-pin contact charging.

Not available

Not available

Charging dock included

Not available

Not available

Battery indicator

Not available

LED, Software24Maker product pagesupport.logi.com/hc/en-ca/articles/28321445268247-Getting-Started-MX-Master-4Read 8 October 2026Exact consumer battery section identifies top status LED and Logi Options+ battery notifications including low-charge warnings. LED colour thresholds are noted externally.

Lighting

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Decorative RGB lightingiUser-configurable decorative lighting. A multicolour status, DPI or battery indicator alone is not decorative RGB.

Not available

No26Reviewphandroid.com/2025/10/15/logitech-mx-master-4-reviewRead 7 October 2026Exact model review explicitly says no RGB lighting despite translucent design elements. Battery and connection LEDs remain separate indicators, not decorative lighting.

Decorative lighting zonesiNumber of independently controlled decorative lighting zones. Status indicator LEDs are excluded.

Not available

Not available

Lighting sync

Not available

Not available

DPI indicator

Not available

Not available

Software

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Software

Not available

Logi Options+1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026

Configuration software platformsiPlatforms explicitly supported for configuring this exact model. Basic input compatibility and availability of a generic app on another platform do not establish model support.

Not available

Windows, macOS1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Logi Options+ for recent versions of Windows and macOS. Basic support on Googlebook laptops and in Logi Tune is not counted.

Onboard memoryiDocumented settings remain available without configuration software running. Which settings persist is stated in source notes.

Not available

Not available

Onboard profilesiMaximum distinct hardware-stored profiles. Software game profiles and factory preset profiles do not establish this maximum.

Not available

Not available

Macros

No5Reviewrtings.com/mouse/reviews/amazonbasics/3-button-usb-wired-mouseRead 21 October 2026Public review text: no customization software and no reprogrammable buttons, so macros cannot be set.

Yes8Reviewbgr.com/2041897/logitech-mx-master-4-reviewRead 6 October 2026Review: in Options+ you can create complex macros. The maker describes Smart Actions that automate multi-step tasks.

Macros stored onboardiMacros themselves execute from mouse memory without the configuration app. Onboard DPI or button assignments alone do not prove onboard macros.

Not available

Not available

Button remapping

No5Reviewrtings.com/mouse/reviews/amazonbasics/3-button-usb-wired-mouseRead 21 October 2026Public review text: no customization software and no reprogrammable buttons.

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: customize every detail, from tracking speed to button shortcuts, with Logi Options+.

Per-app profiles

Not available

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: use app-specific presets for tasks like editing, designing or coding. Requires Logi Options+.

User firmware updatesiA public user-accessible updater or documented software firmware-update procedure exists for this exact model.

Not available

Yes1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Feature text: Update the firmware of your MX Master 4 from the Options+ device settings page.

In the box

2 of 4 differ

In the boxiDocumented contents of the specified colour or bundle. Installed parts and optional extras are distinguished in source notes.

Mouse, 1-Year Limited Warranty4Maker product pageamazon.co.uk/dp/B005EJH6RWRead 21 October 2026UK listing In the Box: AmazonBasics 3-Button USB Wired Mouse (Black) and AmazonBasics 1-Year Limited Warranty. Nothing else is listed.

Mouse, USB-C Bolt receiver, User documentation1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026Package contents: Mouse, USB-C Bolt receiver, User documentation. Same list on the en-gb shop.

Cables included

Not available

Not available

Extra skates includediAn extra usable skate set is supplied separately from installed skates, including an alternative dot set. Factory protective film is not a spare skate.

No4Maker product pageamazon.co.uk/dp/B005EJH6RWRead 21 October 2026The complete In the Box list has no spare feet.

No15Reviewlttlabs.com/products/mice/logitech-mx-master-4Read 7 October 2026Exact own mouse Construction Extra Feet Included row: No. Stock box only, not repair-kit parts.

Grip tape

No4Maker product pageamazon.co.uk/dp/B005EJH6RWRead 21 October 2026The complete In the Box list has no grip tape.

Not available

Links

Not compared

Product page

www.amazon.com/dp/B005EJH6RW1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026

www.logitech.com/en-us/shop/p/mx-master-41Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026

Spec sheet

Not available

www.logitech.com/en-us/shop/p/mx-master-41Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026

Manual

m.media-amazon.com/images/I/C1RapdFAgKL.pdf2Owner's manualm.media-amazon.com/images/I/C1RapdFAgKL.pdfRead 14 October 2026Multi-language leaflet for the 3-Button USB Wired Mouse (B005EJH6RW and the 30-Pack B01ND1K9TT). English text is in the first column. The leaflet lists USB 1.1, 2.0 and 3.0 and a rating of 5 V, 50 mA.

www.logitech.com/content/dam/support/mice/mx-master-4/web-qsg/mx-master-4-universal-web-qsg-ww.pdf10Owner's manuallogitech.com/content/dam/support/mice/mx-master-4/web-qsg/mx-master-4-universal-web-qsg-ww.pdfRead 7 October 2026Official consumer worldwide MX MASTER 4 Setup Guide. English printed pages 3-7. Native maker PDF, not generated manual or Business-only guide.

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.

1year1Maker product pageamazon.com/dp/B005EJH6RWRead 14 October 2026Item details say Warranty Description two years. The Amazon Private Brands warranty PDF linked from the listing says 1 year for Amazon Basics products. The document governs.3Maker spec sheet (PDF)m.media-amazon.com/images/I/616c9XCo3DL.pdfRead 14 October 2026Limited Warranty for Amazon Private Brands, linked from the listing: Amazon Basics products, coverage period 1 year.

1year1Maker product pagelogitech.com/en-us/shop/p/mx-master-4Read 6 October 2026US shop: 1-Year Limited Hardware Warranty. The en-gb and de-de shops state a 2-year limited hardware warranty.

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