Signstek Pat-630 5.8GHZ 8 Channel 200m 20m Wireless Audio Video AV SD TV Sender 1 Transmitter & 3 Receiver (without IR remote) 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. Compatible with DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV output devices. Supports video transmission of PAL/NTSC system and stereo audio transmission. It adopts an advanced 5.8GHz wireless transmission scheme and has the advantages of a long transmission range, strong anti-interference and high mobility.t-multipoint or multipoint-multipoint. The transmitter and the receiver are used in the same channel in a pair and can be used in the modes of point-multipoint or multipoint-multipoint. Support 8 groups of channels. You can select these channels to avoid interference from signals of a wireless router, etc.