HP MOUSE, WIRLESS MOUSE 200, DPI 1000, 2.4 GHz WIRELESS, OPTICAL SENSOR + 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) + 1-YEAR LIMITED WARRANTY SYSTEM REQUIREMENTS : + MICROSOFT WINDOWS 7/ WINDOWS 8/ WINDOWS 10 + MAC OS 10.x OR ABOVE + CHROME OS COLOUR : BLACK