CK0182W Features Built-in 2.4G wireless receiver 90 degree flip Touchpad Flip up and down function key， left and right mouse function keys General Specs Model UKB-500-RF Key Number 92 keys (74 standard keys +18 media keys) DPI Adjustable Transmit Power +5 db Operating Voltage 3.3 V Operating Current <50 mA Charging Voltage 4.2 V 5.05 V Charging Current <300 mA Sleep Current <1 mA Working Distance 15 m Battery 810 mA lithium battery Compatibility PC， HTPC， Google TV， WEB， TV， Android TV Box， iPad， PS3， IPTV System Requirements Windows 2000， Windows XP， Windows Vista， Windows CE， Windows 7， Linux (Debian-3.1， Redhat-9.0 Ubuntu-8.10 Fedora-7.0 tested Dimensions 146.8 × 97.5 × 19 mm (L × W × H) Weight 110 g Package Details Weight: 292.11 g Size: 17.00*12.2*3.4 cm Package Includes * 2.4G Wireless Mini Keyboard