microsoft wireless optical desktop 4000 3.0 silver ps2 usb mac win
experience the comfort of ergonomic design and the convenience of tilt wheel technology and work without interruption with longer battery life . tilt wheel technology experience unrivaled accuracy speed and control as you scroll through documents and web pages . smart receiver go wireless with confidence . smart technology reduces the likelihood of interruption by notifying you when it detects interference or low battery . three times the battery life finally a solution to the top wireless hassle now you can work longer without interruption . many users experience a half year of battery life ergonomic design work in style and comfort . designed by microsoft ergonomics experts the arched shape provides support for your hand in a natural comfortable position .