Wireless mouse laser mouse series logitech m series scanning technology laser motion sensor optical interface usb max resolution 1 000 dpi number of keys 3 compatible operating systems windows xp windows vista windows 7 windows 8 mac os x linux scroll wheel feature 4 way scrolling power supply batteries 2x aa lr06 properties wireless energy saving mode design ergonomic extra keys page backforward button onoff switch scroll wheel range 10 m