EH0309B Features 2.4GHz wireless technology High-sensitive touchpad design with adjustable DPI QWERTY mini keyboard with 92 keys 360 degree flip design Automatically sleep and wake up Ergonomic design， convenient to operate Plug and play Laser pointer with remote control Compatible with PC， Android TV box， Google TV box， Xbox 360， PS3， Home theater， IPTV， etc General Specs Brand & Model Rii i8   Wireless Technology 2.4GHz RF Frequency Range 2.403-2.480GHz Operating Range Up to 15 m Key Number 92 Battery Built-in rechargeable lithium battery Working Voltage 3.3V  Charging Voltage 4.4V-5.25V Modulation GFSK Transmission Power <5dbm Transmission Speed 1m/s Frequency Tolerance +/- 30ppm Package Details Weight: 196.88 g Size: 19.00*11.00*2.8 cm Package Includes * Rii i8 Mini 2.4GHz Wireless Keyboard Mouse Combo with Touchpad * USB Cable * Receiver