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A4Tech OP-20 Schwarz

A4Tech OP-20 Schwarz
alaScore 81

91 reviews

May, 2018

alaTest has collected and analyzed 91 reviews of A4Tech OP-20 Schwarz. The average rating for this product is 4.1/5, compared to an average rating of 4.2/5 for other Mouse & Pointing Devices for all reviews. Views about the reliability and design are overall positive. The size and usability are also mentioned favorably.

usability, size, design, reliability

We analyzed user and expert ratings, product age and more factors. Compared to other Mouse & Pointing Devices the A4Tech OP-20 Schwarz is awarded an overall alaScore™ of 81/100 = Very good quality.

Review analysis

(Based on 91 reviews)

User Reviews  

Showing 9 review(s)

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Showing 1 - 9 of 9 Show Reviews: in English | in other languages (82)

Consumer review ( review summary for A4Tech OP-20 Schwarz


alaTest has collected and analyzed 9 user reviews of A4Tech OP-20 Schwarz from The average user rating for this product is 3.8/5, compared to an average user rating of 4.3/5 for other Mouse & Pointing Devices on People are impressed by the reliability and design. The size and usability are also appreciated.

usability, size, design, reliability

67% of the reviews on give this product a positive rating.

This summary is based on the products: A4 Tech X6-10D GLASER Mouse,strongest surface adoptability,1000 DPI,Built-in Double-Click Butten,USB & PS2 ComboA4 Tech X6-10D GLASER Mouse,strongest surface adoptability,1000 DPI,Built-in Double-Click Butten,USB & PS2 Combo

May, 2018

Product Specifications

A4 Tech is a global leader in manufacturing personal computer products. A4 Tech maintains an exceptionally strong commitment to develop, for it's within the discipline of development that yesterday's fiction becomes tomorrow's reality. PRODUCT FEATURES: Not only does the 800 DPI Optical Resolution delivers absolute precision, but also works on almost any surface with pin point accuracy; It's extra flat surface made your finger feel "Just Fit"(Patented Pending); New Ergonomic, Antiskid Mat Designed, comfortable hand touch; Customized all your special needs with 3 programmable buttons to expedite and thoroughly utilize your computer usage time; This stylish both handed design mouse best fits and comforting works with all hands in any way; The Single Scrolling Wheel not only let its user easily view all page content but also expand its functionality as a programmable button.


Backlight: No
Color of product:Black / Grey / Silver / White
Ergonomic design: Yes
Form Factor:Ambidextrous / Right-hand
Internal: No
Surface coloration:Monotone

Dimensions & Weight


Energy Management

Power Source:Cable


Card reader integrated: No
Customizable weight:No / Yes
Ergonomic design: Yes
LED Indicators:No / Yes
Microphone in: No
Plug and Play: Yes
Rechargeable: No
Retractable cable: No
Works on any surface: Yes


Compatibility:Mac / PC
Packaged Quantity:1
Product Line:A4Tech Skid Free Big Wheel Optical Mouse

Input Device

Button functions:On
Buttons Qty:3
Buttons quantity:2 / 3 / 4
Buttons type:Pressed buttons
Connectivity Technology:Wired
Device interface:PS/2 / USB
Form Factor:External
Interface (DB):PS/2 / USB
Keypad integrated: No
Movement Detection Technology:Optical
Movement detection technology:Optical
Movement Resolution:620 / 800
Number of scroll wheels:1
Programmable mouse buttons: No
Recommended usage:Notebook / PC / PC/notebook
Scroll: Yes
Scroll type:Wheel
Scrolling directions:Vertical


Adjustable keyboard height: No
Device interface:PS/2
Flexible keyboard: No
Keyboard form factor:Standard
Keyboard language:English
Keyboard Layout:QWERTY
Keyboard number of keys:103
Keyboard style:Curved
Keyboard type:QWERTY
Recommended usage:Home
Spill resistant keyboard: No
Wrist rest: Yes


Button functions:On
Buttons quantity:3
Customizable weight: No
Mouse included: Yes
Movement detection technology:Optical
Movement Resolution:800
Number of scroll wheels:1
Scroll: Yes
Scroll type:Wheel
Scrolling directions:Vertical

Other Features

AC adapter bundled: No
AC adapter included:N
Built-in touchpad: No
Compatible operating systems:- Windows2000/XP/MCE2005/XP(x64)/2003(x64)/Vista / - Windows98/ME/2000/XP(X64)/2003(X64)/MCE2005/Vista X86&X64\n- Mac OS 9.X~10.X / Microsoft Windows 2000/2003/XP/Vista/7 / Win Me, 2000, XP,2003 / Windows98/ME/2000/XP(X64)/2003(X64)/MCE2005/Vista X86&X64 / Windows98/ME/2000/XP/2003/MCE2005/Vista
Connectivity Technology:Wired
Depth:4.6 / 4.68 / 8.3
Depth (imperial):4.6 / 4.68 / 8.3
Display included: No
Height:1.3 / 1.39 / 1.5
Height (imperial):1.3 / 1.39 / 1.5
Mouse dimensions (WxDxH):2.48 x 4.69 x 1.38 / 2.48 x 4.69 x 1.39 / 4.02 x 5.67 x 1.65
Number of products included:1
Product dimensions (W x D x H):2.48 x 4.69 x 1.38 / 2.48 x 4.69 x 1.39 / 4.02 x 5.67 x 1.65
USB 2.0 ports quantity:1
USB required:No / Yes
Warranty note:Y
Weight:0.19 / 1.62
Weight (imperial):0.19 / 1.62
Width:17.5 / 2.48 / 2.8
Width (imperial):17.5 / 2.48 / 2.8
Wireless technologies:Wired

Packaging Content

Bundled software:iKeyWorks
Cables included:PS/2
User guide:N

Packaging Data

AC adapter bundled: No
AC adapter included:N
Additional accessories:N
Bundled software:iKeyWorks
Cables included:PS/2 / USB
Package type:Blister / Box
Packaging type:Blister / Box
User guide: No


Power Source:Cable

System Requirements

Mac operating systems supported: Yes
Windows operating systems supported:720 x 480, 720 x 576, 1920 x 1080 (HD 1080), 640 x 480 (VGA) / Windows 2000, Windows 2000 Professional, Windows 98, Windows ME, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64 / Yes

Weight & Dimensions

Depth:4.65 / 4.69
Height:1.38 / 1.39
Mouse weight:3.03
Weight note (metric):3.03