UEB Measy GP800 USB Wireless Touchpad Keyboard Android PC Smart TV Wireless Keyboard: it is 2.4GHz wireless connection, distance can up to 30 meters Touchpad Designed: laptop touch pad, high sensitivity and easily manipulated Backlight Designed: built-in backlight multimedia control key make you convenient to use even in dark envirement Compatible system: OS System, Windows XP/Vista/7/98/NT/Me Little Size and Lightweight: size: 147mm x 85mm x 20mm, weight: 100g, portable and fit for hand hold