EH0223B Features 2.4GHz radio transceiver 10 meter working range Plug and play Built-in 180mA rechargeable lithium battery Can work with one or more devices Uses direction keys to move mouse (without gyroscope) General Specs Brand & Model ipazzport KP-810-20A Color Black Type Wireless remote control Key Material Silicone Battery Type Built-in 180mA rechargeable lithium battery Charging Voltage 4.2-5v Power Voltage 3.7v System Required Windows 98/2000/2003/XP/Vista/Windows 7/CE/Mac OS/ Linux/Android PC OS Product Details (without package and accessories) Dimensions 120 x 42 x 9.5mm Weight 39g Package Details Weight: 116.63 g Size: 22.00*12.5*3.00 cm Package Includes * ipazzport KP-810-20A 2.4GHz Mini Wireless Remote Control