The 2.4GHz RF Remote with Optical Finger Navigation is designed for Internet TVs and computers connecting large size display. By using the 2.4GHz RF remote with optical finger navigation, you can control the Internet TV or computer more than 10 meters away. You can use the optical finger navigation as a mouse by just slightly moving your finger over the surface of it. When using two AAA alkaline batteries, the battery life can be about half a year. In addition, you can also use one or two low price wireless microphone pairing to the common USB dongle for VoIP, voice search, voice control and other voice applications.