Specification:√Item Type: Wireless Finger Ring MouseMaterial: ABSResolution: 1000DPIWireless Frequency band: 2.4G Mhz/ BluetoothCharging Time: 2 hoursUsage Time: 15 hours(Continuous use) 170 days (standby)Service Distance: 10-12 metersSupported System: for XP/WIN7/8Battery Type: Lithium battery 150mAhx1 (built in)How to Use:1: First push the long end of the ring buckle (low buckle) into the inner slot of the mouse (button edge)2: Then put the short end of the ring buckle (high buckle) to the other side of the wild card slot down Package List:1 xWireless Finger Ring Mouse1 x Receiver 2 x Spare Ring 1 x USB Cable 1 x User Manual