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A4Tech OP-20 Schwarz

A4Tech OP-20 Schwarz
alaScore 80

85 reviews

Nov, 2015

  • No negative mentions yet

alaTest has collected and analyzed 85 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. Reviewers really like the usability. The size is also mentioned favorably.

size, usability

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 80/100 = Very good quality.

Review analysis

(Based on 85 reviews)

User Reviews  

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Showing 1 - 4 of 4 Show Reviews: in English | in other languages (81)

Consumer review by: ( review summary for A4Tech OP-20 Schwarz


alaTest has collected and analyzed 4 user reviews of A4Tech OP-20 Schwarz from The average user rating for this product is 3.3/5, compared to an average user rating of 4.2/5 for other Mouse & Pointing Devices on Reviewers are impressed by the usability. The size also gets good views.

size, usability

50% of the reviews on give this product a positive rating.

This summary is based on the products: A4 Tech OP-620 BK, 800DPI Double-Click Optical Mouse, PS2A4tech Skid Free Big Wheel Optical Mouse Op-20 - RedA4 Tech X6-10D GLASER Mouse,strongest surface adoptability,1000 DPI,Built-in Double-Click Butten,USB & PS2 Combo

Nov, 2015

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.

Dimensions & Weight



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

Input Device

Buttons Qty:3
Connectivity Technology:Wired
Form Factor:External
Interface (DB):PS/2 / USB
Movement Detection Technology:Optical