Enjoy home entertainment and game freely without any inconvenience from the big keyboard and mouse. Built-in high sensitive smart touchpad with 360-degree flip design. The handheld design is easy to carry and operate. Perfect for PC, Pad, Android TV Box, Google TV Box, for Xbox 360, for PS3, HTPC/IPTV, etc. Specification: Measurements(L x W x H): 147x98x20mm Weight: Approx.108g Operation range: up to10 meters/30 feet Transmit power: +4db Max Operation voltage: 3.3V Operation current: 10mA Charging current: 300mA Sleep current: 1mA Battery Type: Built-in lithium-ion battery Computer 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) Android Package Includes: 1 Wireless keyboard 1 Wireless receiver 1 Charging data cable 1 User manual Note: if not successful after install the driver, please process as below steps. a. turn on the power and press fn+RF simultaneous till light flashing; b. plug dongle into usb port,the light would turn off after ten seconds; c. Then try it.