Wireless mouse series logitech m series motion sensor optical interface usb max resolution 1 000 dpi number of keys 3 suitable for laptops compatible operating systems windows xp windows vista windows 7 windows 8 mac os x linux scroll wheel feature 2 way scrolling power supply battery aa lr06 properties plug play wireless extra keys scroll wheel onoff switch range 10 m frequency range 24 ghz colours black grey motif bicolour manufactu