Brand N/A Model RT-MWK02 Quantity 1 Piece Color Black Material TPU Compatible Models Desktops laptops car TV HTPC TV smart TV HDD player network player and X-Box Supported OS Operation system: Widows 2000 / XP / Vista / CE / 7 / Mac OS 10.x or lower Linux (Debian-3.1 Redhat-9.0 Ubuntu-8.10 Fedora-7.0 tested) Android 3.0 Wired/Wireless Wireless Keys 72 Connection Wireless Operating Range 10 m Battery 300 mAh Charging Time 4h Standby Time 500~700h Features Working temperature: -10~55'C; Battery: rechargeable li-ion polymer battery 300mAh safe and durable; Charging time: 4h; Standby time: 500~700h; Operating range: 10m; Adjusting mode: DSSS; Transmitting power: Max. 4dBm; Working voltage: 3.3V; Working current: Packing List 1 x Keyboard 1 x USB receiver 1 x Cable (35cm) 1 x English user manual