Wireless mouse touch mouse series microsoft arc scanning technology bluetrack motion sensor optical interface usb 20 max resolution 2 400 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 touch scrolling power supply batteries 2x aaa lr03 properties wireless plug play extra keys onoff switch range 10 m frequency range 24 ghz colou