Mice / Compare

Nulea M501 Wireless Trackball Mouse vs ProtoArc EM01 NL

A

Product A: Nulea

M501 Wireless Trackball Mouse

58 of 154 known

Change Nulea M501 Wireless Trackball Mouse

Compare the ProtoArc EM01 NL with

Search mice

B

Product B: ProtoArc

EM01 NL

58 of 154 known

Change ProtoArc EM01 NL

Compare the Nulea M501 Wireless Trackball Mouse with

Search mice

All 154 fields

Every value links to where we found it.

Only differences

ANulea M501 Wireless Trackball Mouse

BProtoArc EM01 NL

General

2 of 9 differ

Series

Not available

EM Series7Maker product pageprotoarc.com/collections/em-seriesRead 15 October 2026The EM Series collection page lists the EM01 NL.

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

M5013Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page: Model M501.

CP014935, CP014939, CP014938, CP014936, CP0149402Maker product pageprotoarc.com/products/em01-nl-trackball-mouse.jsonRead 15 October 2026The maker's store feed lists these SKUs by colour. Gray CP014935, Red CP014939, Silver CP014938, Purple CP014936, Gold CP014940.

GTIN / EAN

Not available

Not available

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

Not available

Not available

Status

Available1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Store page lists the mouse in stock at 33.99 USD for Red. Other colours are 34.99 to 36.99 USD.

Available1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Store page offers the mouse in five colours with a sale price of 37.99 USD.

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

Not available

Not available

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

Not available

Not available

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

$39.995Maker product pageweb.archive.org/web/20211127234425/https://nulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Archived maker page of 2021-11-27, 11 days after the store page was published, shows 39.99 USD with no sale price. US price excludes tax.

$39.993Maker product pageweb.archive.org/web/20240618162313/https://www.protoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026First archived copy of the maker's page, 18 days after publication, lists Gray Ball at 39.99 USD and Red, Silver, Purple, Blue and Gold at 44.99 USD with no compare-at price. A mid-year coupon banner was shown separately. US price excludes tax. The base value is the Gray price and each colour row repeats its own 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.

Not available

Not available

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

Not available

Not available

ColoursiThe maker's own colour names

Red, Blue, Black, Silver, Pink, Purple, Green, Orange, Gold1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026The colour selector lists Red, Blue, Black, Silver, Pink, Purple, Green, Orange and Gold. A separate store page, Nulea M501 Wireless Trackball Mouse Dark Blue, exists since 2025-03-25 and is not stored here.

Gray, Red, Silver, Purple, Gold2Maker product pageprotoarc.com/products/em01-nl-trackball-mouse.jsonRead 15 October 2026Store feed colour names. The colour is the trackball colour. The body is dark gray.

Segment

Ergonomic1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026The page files the mouse under ERGO MICE and describes an ergonomic design for all-day comfort.

Ergonomic1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026The page titles the mouse an Ergonomic Trackball Mouse and names ergonomic design for all-day comfort.

Mouse type

Trackball1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026The page describes a trackball moved by thumb control.

Trackball1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page: Thumb Control Trackball.

Shape

0 of 14 differ

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.

Asymmetric, right-handed7Retailer pageamazon.com/dp/B09HHHDZZGRead 15 October 2026Product information lists Hand Orientation Right. The brand's comparison chart marks every Nulea trackball in it as Right.

Asymmetric, right-handed6Retailer pageamazon.com/dp/B0CWTY6Z99Read 15 October 2026Product information lists Hand Orientation Right. The manual drawing shows the ball on the left for the right thumb.

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

Not available

Ring or pinky finger rest

Not available

Not available

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

Not available

Not available

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

34mm7Retailer pageamazon.com/dp/B09HHHDZZGRead 15 October 2026Brand comparison chart on the Amazon page lists Trackball size 34mm for the M501 column.

34mm5Maker product pageprotoarc.com/pages/faq-em01-em01-nlRead 15 October 2026FAQ for the EM01 and EM01 NL: the trackball is made of resin with spray paint and has a diameter of 34 mm.

Trackball position

Thumb7Retailer pageamazon.com/dp/B09HHHDZZGRead 15 October 2026The same chart lists Trackball Control Method Thumb Control for the M501. The ball sits under the thumb on the left wall.

Thumb1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page: your thumb will control the cursor, and the product name says Thumb Control Trackball.

Dimensions and weight

2 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.

Length136Maximum width103Maximum height50mm(5.4 × 4.1 × 2 in)3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists Size 136x103x50 mm. The drawing marks 136 mm as body length, 103 mm as width across the trackball lobe and 50 mm as height. A ManualsLib copy of an older manual lists 137x104x51 mm and Frontum lists 104 mm and 51 mm. The current maker manual is stored.

Length125Maximum height39.3mm(4.9 × 1.5 in)1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists Height 125 mm, Width 63.4 mm and Depth 39.3 mm. The manual lists 4.92 x 2.5 x 1.55 in. Stored as length 125 and height 39.3. The 63.4 mm width is left out. The maker's top-view drawing shows a body wider than half its length once the thumb lobe is included, so the figure appears to exclude the lobe. No source says what the width covers. A reviewer of the EM01 lists the same 63 x 125 x 39 mm.

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

Not available

Not available

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.

128g(4.5 oz)3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists Weight 128 g. Amazon lists 4.51 oz (127.9 g). The mouse has a built-in battery, so the weight includes it. Colour not stated. A ManualsLib copy of an older manual lists 130 g.

191g(6.7 oz)1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists 6.38 oz (181 g) without the receiver. The English manual lists 6.74 oz (191 g). The manual value is stored. It includes the built-in battery. Colour not stated.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters, page 8: Weight 6.74 oz (191 g). The product page lists 181 g. The manual is preferred over the page.

Box dimensions

Not available

Not available

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

Not available

Not available

Sensor

6 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

Advanced Optical Tracking1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists Sensor technology ProtoArc Advanced Optical Tracking. No physical sensor part is named.

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

ProtoArc1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab names ProtoArc as the brand of the optical tracking.

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

Not available

Sensor type

Optical3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026FAQ 1 tells the user to wipe carefully near the optical sensor.

Optical1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists Advanced Optical Tracking. The manual lists Optical.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters, page 8: Movement Detection Technology Optical.

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.

1,600DPI1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q4: 4 DPI settings, 400 (Default)-800-1200-1600. The manual agrees. Images on the same page say 5 DPI Level, and Amazon and retailer listings of older units list 100-200-400-800-1200. The FAQ and manual value is stored.3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists DPI 400 (Default)-800-1200-1600.

1,600DPI1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists DPI 200/400/800/1200/1600. An icon on the same page says 3 Adjustable DPI, which conflicts with the 5 levels in the text, the specs tab and the manual.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: DPI 200-400-800-1200-1600.

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

400DPI1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q4: 4 DPI settings from 400 to 1600. No lower setting is documented.3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists DPI 400 (Default)-800-1200-1600.

200DPI1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists DPI 200/400/800/1200/1600.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: DPI 200-400-800-1200-1600.

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

Not available

Not available

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

41Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q4 and the manual list four DPI levels. The manual says more speed can only be set in the computer's own pointer settings.3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026DPI Mode: there are 4 DPI levels.

51Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page text: 5 DPI levels. The manual agrees with five levels.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Page 3: one red flash means 200 DPI, two 400, three 800, four 1200 and five 1600.

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

400, 800, 1,200, 1,600DPI1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q4: 400 (Default), 800, 1200 and 1600.3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026DPI Mode: the red light flashes once, twice, three or four times for 400, 800, 1200 and 1600 DPI. The default is 400.

200, 400, 800, 1,200, 1,600DPI1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists the five levels. The manual says the factory default is 400.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Page 3: the factory default DPI value is 400 and the DPI+ and DPI- buttons step through 200, 400, 800, 1200 and 1600.

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.

30IPS3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists Tracking Speed 30 In/sec. Stored as published, with no qualifier.

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

Not available

Not available

Sensor position

Not available

Not available

Performance

2 of 8 differ

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.

ANulea M501 Wireless Trackball Mouse

Data connection	Polling rate (Hz)	Receiver requirement
2.4 GHz	250	included USB receiver
Bluetooth	115	Not available

Source3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists Report Rate 250 Hz (2.4G) and 115 Hz (Bluetooth). Read as the report rate.

BProtoArc EM01 NL

Data connection	Polling rate (Hz)	Receiver requirement
2.4 GHz	250	included USB receiver
Bluetooth	125	Not available

Source4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: 2.4G reaction rate 250 Hz and Bluetooth reaction rate 125 Hz. Read as the report rate.

Max polling rate

250Hz=CalculatedFrom Documented polling rates by connection

250Hz=CalculatedFrom Documented polling rates by connection

Polling rate (wired)

Not available

Not available

Polling rate (2.4 GHz)

250Hz=CalculatedFrom Documented polling rates by connection

250Hz=CalculatedFrom Documented polling rates by connection

Polling rate (Bluetooth)

115Hz=CalculatedFrom Documented polling rates by connection

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

None of 7 known

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

Not available

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

1 of 11 differ

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

Not available

Not available

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

3million1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page lists click life of more than 3 million times. The manual says 3 million+. Stored as the 3 million threshold.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: Click life 3 million+.

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

Not available

Not available

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

Not available

Side switch model

Not available

Not available

Middle click switch

Not available

Not available

Scroll encoder type

Not available

Not available

Scroll encoder

Not available

Not available

Buttons and scroll wheel

7 of 13 differ

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.

73Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Product Features diagram labels Left Key, Right Key, Scroll Wheel, Move Forward Key, Move Backward Key, DPI Switch Key and a Mode Key on the underside. A buyer guide counts the scroll click among the maker's six buttons. The Mode Key switches the connection, so it counts under the schema rule. The ON/OFF button only switches power and is not counted. The maker's own count is 6.6Reviewgamingpcguru.com/nulea-m501-trackball-reviewRead 15 October 2026Article dated 2026-05-20 and updated 2026-10-09 lists six buttons: two main clicks, scroll click, DPI and two thumb buttons for forward and back. It reports no hands-on testing. The Mode Key on the underside is added under the schema rule, so the stored count is 7.

81Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab says 10 buttons and lists Left, Middle and Right click, Back and Forward, Scroll-wheel, Precision Switch and Multi-Device switch. That count includes scroll up and down as separate inputs. The manual draws 8 physical buttons.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Product Features page 2 labels A Left, B Right, C Forward, D Backward, F DPI -, G DPI +, I Scroll Wheel and J Channel Switch Button. That is eight inputs with the wheel click. The power switch is not counted. Scroll rotation 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.

01Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q3: all buttons are not programmable.

05Maker product pageprotoarc.com/pages/faq-em01-em01-nlRead 15 October 2026FAQ for the EM01 and EM01 NL: all keys are not programmable.

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.

23Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Move Forward Key and Move Backward Key sit on the thumb-side wall.

44Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026The drawing and photos put Forward, Backward, DPI - and DPI + on the left wall, the thumb side of the right-handed body. Forward and Backward sit above the ball and the two DPI buttons below it.

Side buttons on

Left3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The diagram shows both buttons on the left wall of this right-handed mouse, above the trackball.

Left4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026The drawing shows the buttons on the left wall.

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

Yes3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Diagram label: DPI Switch Key.

Yes4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Product Features: F DPI - Button and G DPI + Button.

DPI button position

Top3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Diagram and photos show the DPI key on the top shell below the scroll wheel.

Not available

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

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The complete control list in Product Features has no profile button.

Not available

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

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The complete control list has no dedicated DPI-shift button.

Not available

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

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The complete control list has no gesture button.

Not available

Scroll wheel

Not available

Not available

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

Not available

Not available

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

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The complete control list has no separate thumb wheel.

Not available

Scroll wheel material

Not available

Not available

Build

1 of 6 differ

Shell material

ABS3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Specifications page lists Material ABS.

Not available

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

Not available

Not available

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

Not available

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

Not available

Not available

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

Not available

Not available

Feet thickness

Not available

Not available

Cable

0 of 5 differ

Cable

Not available

Not available

Cable length

Not available

Not available

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

Not available

Not available

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.

USB-C3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Charging section: Type-C charging cable. Photos show the USB-C socket on the front edge. The cable is for charging and cannot be used as a wired mouse.

USB-C4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Product Features: N TYPE-C Charging Port.

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

USB-A3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Troubleshooting says not to use a Type C-C cable, so the supplied cable has another host plug. The included cable is a USB-A to USB-C charging cable by that rule.

USB-A4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Charging Guide page 6 draws the cable with a USB-A plug on the computer end.

Connectivity

2 of 13 differ

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

2.4 GHz, Bluetooth1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Page says the mouse connects by Bluetooth or a 2.4G USB receiver. The USB cable is for charging only, so no wired mode is stored.

2.4 GHz, Bluetooth1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists a USB receiver and Bluetooth low energy technology. The Type-C port only charges.

Wireless technology

Not available

Not available

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

Not available

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.

23Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The mode switch diagram shows two Bluetooth channels, BT1 and BT2, and one 2.4G channel. Troubleshooting says one channel pairs with one device.

24Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Page 7 shows channel 1 for 2.4G USB and channels 2 and 3 for Bluetooth 1 and Bluetooth 2.

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.

31Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Page says it connects to up to 3 devices via Bluetooth or the USB dongle.

31Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page: connect via Bluetooth or the 2.4G USB receiver and control three devices with one button.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Page 7: press the channel switch button to switch between 3 devices.

Device switching

Button1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Page says to switch between devices with the button on the bottom.

Button4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Page 7: the channel switch button on top of the mouse.

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.

USB-A3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The 2.4G Connection page draws a nano receiver with a USB-A plug.

USB-A4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Product Features and USB Connection pages draw a nano receiver with a USB-A plug.

Receiver storage in mouse

Yes1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Page and FAQ Q5: the 2.4G USB receiver is stored at the bottom of the mouse.

Not available

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

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Package Content lists the mouse, manual and cable only.

No4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Packing List is complete and lists no extender.

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

Not available

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

10m7Retailer pageamazon.com/dp/B09HHHDZZGRead 15 October 2026Product information lists Range 10.0 meters. Test conditions are not stated and the maker does not publish a range.

10m1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab lists a wireless operating distance of 10 m (32.8 ft). Test conditions not stated.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: Transmission distance 10 m for Bluetooth and for 2.4G. Test conditions not stated.

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 pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Page says the forward and backward buttons are not compatible with macOS, which confirms macOS use. The manual gives Windows and macOS Bluetooth steps. No other operating system is documented on the current page.

Windows, macOS, Linux, Android, iOS1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026System requirements: the receiver works with Windows XP, 7, 8, 10 or later, Linux and macOS 10.10 or later. Bluetooth works with Windows 8, 10 or later, Linux, macOS 10.10 or later and Android 4.3 or later. The manual adds iOS 9.2 and above for Bluetooth.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: Bluetooth works with Windows 8, 10 or higher, macOS 10.10 or higher, Android 4.3 or higher and iOS 9.2 and above. 2.4G works with Windows XP, 7, 8, 10 or higher and macOS 10.10 or higher. The product page adds Linux.

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

Not available

Not available

Battery

4 of 17 differ

Battery type

Li-ion7Retailer pageamazon.com/dp/B09HHHDZZGRead 15 October 2026Product information lists 1 Lithium Ion batteries required. The battery is built in and not a replaceable cell.

Li-Po1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page: rechargeable Li-Po (900 mAh) battery.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: Lithium battery capacity 900 mAh.

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

900mAh1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page and manual: 900 mAh.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Data Parameters: Lithium battery capacity 900 mAh.

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

No1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026Page describes a built-in rechargeable battery. The manual says do not disassemble. No replacement procedure is given.

No1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page describes a built-in rechargeable battery. The manual gives no replacement procedure.

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

90days1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab: battery life up to 90 days on a single full charge. Usage and settings are not stated. A page image says 300+ days standby time, which is not a battery life claim.

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

USB-C1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ and page images: the mouse charges over a Type-C cable. The charging indicator turns blue while charging.

USB-C1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page: charge with the included USB-C charging cable.

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

Not available

210min4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Charging Guide: the charging time is about 1 to 3.5 hours. Stored as the 3.5 hour upper bound.

Quick charge

Not available

Not available

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

Not available

Not available

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

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Package Content is complete and lists no dock. The mouse charges over its Type-C port.

No4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Packing List is complete and lists no dock. The mouse charges over its Type-C port.

Battery indicator

LED1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q1: an indicator light under the DPI button turns blue when charging and off when fully charged. The manual adds a red flicker for low battery.

LED4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Charging Guide: the charging indicator light flashes red when the battery is low and stays red while charging. It turns off when fully charged.

Lighting

1 of 4 differ

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

Not available

No1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026The maker's FAQ says the EM01 NL has no RGB light.5Maker product pageprotoarc.com/pages/faq-em01-em01-nlRead 15 October 2026FAQ: the EM01 NL does not have an RGB light, but the EM01 does.

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

LED3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Light Indication: DPI switching shows a red light.

LED4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Page 3: a red indicator light flashes to show the DPI level.

Software

0 of 9 differ

Software

Not available

Not available

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

Not available

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

Not available

Not available

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

No1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026FAQ Q3: all buttons on this wireless trackball mouse are not programmable.

No5Maker product pageprotoarc.com/pages/faq-em01-em01-nlRead 15 October 2026FAQ for the EM01 and EM01 NL: all keys are not programmable.

Per-app profiles

Not available

Not available

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

Not available

Not available

In the box

1 of 4 differ

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

Wireless Trackball Mouse, User Manual, Type-C Charging Cable3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Package Content: 1 Wireless Trackball Mouse, 1 User Manual, 1 Type-C Charging Cable. The USB receiver is stored in the mouse and is not listed.

Wireless Mouse, USB Receiver, Type C Charging Cable, User Manual1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Specs tab package contents: EM01 NL Trackball Mouse, USB Receiver, USB-C cable for recharging, User Manual. The manual's packing list is stored.4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Packing List: 1 x Wireless Mouse, 1 x USB Receiver, 1 x Type C Charging Cable, 1 x User Manual.

Cables included

ANulea M501 Wireless Trackball Mouse

Type	Cable count
Type-C charging cable	1

Source3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Package Content: 1 Type-C Charging Cable.

BProtoArc EM01 NL

Type	Cable count
Type-C charging cable	1

Source4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Packing List: 1 x Type C Charging Cable.

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.

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Package Content is complete and lists no spare skates.

No4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Packing List is complete and lists no spare skates.

Grip tape

No3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026Package Content is complete and lists no grip tape.

No4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026Packing List is complete and lists no grip tape.

Links

Not compared

Product page

nulea.com/products/nulea-m501-wireless-trackball-mouse1Maker product pagenulea.com/products/nulea-m501-wireless-trackball-mouseRead 15 October 2026

www.protoarc.com/products/em01-nl-trackball-mouse1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026

Spec sheet

cdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdf3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026The manual's Specifications page is the only spec table the maker publishes.

www.protoarc.com/products/em01-nl-trackball-mouse1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026

Manual

cdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdf3Owner's manualcdn.shopify.com/s/files/1/0549/9768/0300/files/M501_Wireless_Trackball_Mouse_-_User_Manual.pdfRead 15 October 2026

cdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdf4Owner's manualcdn.shopify.com/s/files/1/0551/3972/9497/files/EM01_NL_User_Manual.pdfRead 15 October 2026

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

1 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.

1year4Maker product pagenulea.com/pages/product-warrantyRead 15 October 2026All Nulea keyboard and mouse products come with a 12-month warranty from the date of purchase. US store. An archived page of 2021 offered 18 months at launch.

2years1Maker product pageprotoarc.com/products/em01-nl-trackball-mouseRead 15 October 2026Page states 2-Year Limited Hardware Warranty on the US store.

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