HP MOUSE, WIRELESS MOUSE, MODEL NO : S500 WIRELESS MOUSE, DPI - 1000, 2.4GHz WIRELESS, OPTICAL SENSOR + DIMENSIONS : 108(L) x 61 (W) x 38 (H)mm + WEIGHT : 63.2g + RELIABLE 2.4GHz WIRELESS CONNECTION + CONTOURED SHAPE FOR ALL-DAY COMFORT IN EITHER HAND + OPTICAL SENSOR WORKS ON A VARIETY OF SURFACES + WIRELESS CONNECTIVITY UP TO 30ft (10m) + HP STANDARD 1-YEAR LIMITED WARRANTY SYSTEM REQUIREMENTS : USB PORT COMPATIBILTY : + MICROSOFT WINDOWS 7/ WINDOWS 8/ WINDOWS 10, MAC OS COLOUR : BLACK