Kensington Silent Mouse-for-Life Wireless USB Mouse - Black (K72392US) Quiet clicking for quiet environments 2.4GHz wireless freedom with storable Nano receiver Ambidextrous, contoured shape for either right-handed or left-handed users High-definition optical sensor (1000 DPI) for responsive control Compatible with Windows 8.1, 8, 7 and Mac OS X Plug & Play installation with Nano USB receiver Low battery indicator and on/off switch Built to last with a 5-year limited warranty