The best performance ratio of the HE frog mouse !

Wireless Version: 2.4G Wireless Technology/Bluetooth Wireless Technology Tracking Method: Optical, 1600DPI Max DPI Switchable: 800/1200/1600DPI Working with: 2pcs AA battery Double Scroll Wheel design, with special Multifunction Software Made in intelligent power system, auto switch Working/Standby/Sleep modes for conservation Power On/Off button to save power Working Range: 10 Meters Systems supported: XP/Vista/Win7/Mac OS