... .No need driver, plug-and play.Ergonomically designed, comfortable to use.Automatic Power off (APO)Intelligent Power Saving (IPS) ... Nano USB Dongle.Ultra slim, compact and lightweight, easy to carry.Decent and modern design.Ideal laptop and desktop companion ... :Buttons: Left button, right button, rolling wheelOperation range: Up to 10mOperation systems: Windows 98, 2000, ME, XP, Vista, Win 7 ...