2.4G Wireless Keyboard for Smart TV 1. Optical Trackball and Mouse Buttons 2. 10m wireless ... range 3. Android, Windows, Linux 2.4G Wireless Keyboard for Smart TVOverview1. 2.4G wireless technology2. Built-in Optical Trackball; 2 ... Informations1-year limited hardware warranty 2.4G Wireless Keyboard for Smart TV