Blue tooth spec.1.2 compliant Bluetooth Human Interface Device (HID) supported Resolution:1000Dpi Bluetooth Class II devices 10 meters coverage area Excellent receiver sensitivity Easy browsing scroll wheel Ergonomically designed to fit right and left hand Power on/off switch for power management 1000Dpi optical technology Support Window98/2000/XP/ME/Vista High quality plate contact points size: 116*56*34mm