YUMQUA Y-10W 2.4 GHz Portable Finger Handheld Wireless USB Trackball Mouse for PC Laptop Mac Lovers YUMQUA Y-10W Wireless Trackball Mouse 3 Months Free replacement and after sale service available, please buy with confidence. Trackball mouse with scroll: Interface PS/2 or USB. Compatible System: Windows 98/ 2000 / XP / VISTA / Win7/ Win10/ Linux / Unix / Mac OS/ Android OS. Four group adjust DPI:400,600,800,1200. Effective distance within 10M. Ambidextrous design mouse for left or right-handed users. Ergonomic Design: Cordless trackball mouse can greatly ease the harm of palm joint or muscle for long time using mouse.