Signstek Pat-630 5.8GHz Wireless Audio Video Sender Transmitter + 2 Receivers TV Extender Compatible with DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV output devices. Support 8 groups of channels. You can select these channels to avoid interference from signals of a wireless router, etc. NOTE:The television must be set to PAL or NTSC. check whether the product launch and reception will be connected to the transmitter (Transmitter), the receiver flag (Re) The product consist of a transmitter and a receiver, by means of radio waves,transmitting AV signals of DVD, DVR,CCD camera, IPTV, satellite STB, digital TV STB and other similar device,reciving them at distant end and input them into a TV set to be display It adopts an advanced 5.8GHz wireless transmission scheme and has the advantages of a long transmission range, strong anti-interference and high mobility. The product is recommended for use in a 42 inch TV set because of the bandwidth of the transmission, and more than 42 inches of television may result in black or white 5.8GHz module is CE & FCC certificated. Wireless application is safe and reliable. Use 5.8GHz ISM frequency band. Images are vivid and stable, the color is flamboyant,and sound is clear.