· Receiver (dongle): Nano style · Connect port: With USB2.0 above · RF mode: 2.4Ghz GFSK · Transmission distance: Up to 10 meters · Transmission Power: Less than +4db · Power supply: Rechargeable 450mAh polymer Lithium-ion battery · Charging voltage: 4.4V ~ 5.25V · Charging current: 300mA · Sleeping Current class1: 86uA · Operation Voltage: 3.7V · Operating Current: 22mA · Product weight: 110g · Product Size: 200*58*19mm System Requirements · HID compatible device · USB port · Windows 2000 · Windows XP · Windows Vista, Windows CE, Windows 7 · Linux (Debian-3.1, Redhat-9.0 Ubuntu-8.10 Fedora-7.0 tested) · Android OS (With standard USB interface)