Brand RII Model i12 Quantity 1 Color Black + silver Material Plastic + stainless steel Key Numbers 80 Connection Method 2.4G Wireless Power Supply Built-in rechargeable battery Battery Capacity 280mAh Supports System Windows 2000 / XP / Vista / CE / 7 / 8Linux (Debian-3.1 Redhat-9.0 Ubuntu-8.10 Fedora-7.0 tested) Android OS (with standard USB interface) Other Features 2.4GHz wireless connection; Operating distance: 10M; Transmitting power: +5dB; Working voltage: 3.3V; Operating current: Packing List 1 x Keyboard 1 x Receiver 1 x Data cable (80cm) 1 x English manual