EH0277B Features 2.4GHz wireless RF technology 6-Axis air mouse and 83-keys wireless keyboard Windows multimedia control keys (Google TV hotkey) Perfect for conferences， presentations and lectures General Specs Brand & Model Rii RT-MWK24 Processor (MCU) Sonix Technology 2.4GHz RF wireless Operating Distance Up to 10 m Transmit Power Less than 5dB Power Supply Rechargeable 450mAh polymer lithium-ion battery Connector USB2.0 Charging Voltage 4.4V-5.25V Charging Current 300mA Sleeping Current Class 1 50uA Operating Voltage 3.7V Operating Current <70mA Key Number 83 keys Dimensions 200 x 58 x 19 mm Weight 100 g Package Details Weight: 180.83 g Size: 21.00*9.3*2.5 cm Package Includes * Rii RT-MWK24 2.4GHz Mini Wireless Keyboard + Air Mouse