IOKONE Vechicle TV tuner Digital TV Receiver Digital HD ATSC TV Tuner 4 Video Output for Air Antenna TV Channels for United States Canada Mexico This digital HD TV tuner lets you watch free over-the-air digital channels using indoor or outdoor antennas in North America area. Starts enjoying free TV broadcast channels through the air and no monthly subscription fee. Reception frequency:50-810MHz (USA) Audio:2 audio output(Double track stereo output);Video:4 video input/output(Composite video CVBS) Reception sensitivity:-100dBm(USA);Working Speed: 180KM/h;