Design
Form factor	Ambidextrous
Product colour	Black
Mouse
Connectivity technology	Wired
Movement detection technology	Optical
Movement resolution	400 DPI
Scroll type	Ring
Buttons quantity	4
Trackball diameter	5.5 cm
Programmable mouse buttons
Other features
Compatibility	Surface Laptop 4; Surface Pro 5; Surface Laptop 6 (13.5"); Surface Laptop Go 2; Surface Laptop 5 (15"); Surface Laptop; Surface Laptop 13"; Surface Pro 4; Surface Laptop 15"; Surface Laptop 2; Surface Laptop 3; Surface Pro 6; Surface Pro 7; Surface Pro 7+; Surface Laptop SE; Surface Laptop 13.8"; Surface Laptop Go; Surface Laptop 5 (13.5"); Surface Laptop Studio 2; Surface Laptop Go 3; Surface Laptop 6 (15")
Special features	SmartFitTM; Ambidextrous Design
Compatible operating systems	macOS Sierra 10.12; macOS 10.13 or above; macOS X 10.11; Windows 11; Windows 8; macOS 10.9; Windows 10; macOS 10.10 or above; Chrome OS 44 or above; Windows 7; Windows 8.1; macOS 10.8
Trackball
System requirements
Other operating systems supported	ChromeOS
Windows operating systems supported
Mac operating systems supported

Designed for PCs and Macs, the Expert Optical Trackball employs Kensington's DiamondEye optical technology for smooth, precise cursor movement. Surrounding the ball, is a Scroll Ring that puts scrolling right at your fingertips. Expert Optical Trackball even comes with a soft wrist rest-right.