CE Compass 5.8GHz 8 Channel Wireless Audio Video AV Transmitter Receiver W/ IR Remote Extension Wire 200M Use 5.8GHz ISM frequency band Support 8 groups of channels. You can select these channels to avoid interference from signals of a wireless router, etc Wireless transmission is suitable for one-floor The transmitter and the receiver are used in the same channel in a pair and can be used in the modes of point-to-multipoint or multipoint-to-multipoint Compatible with DVD, DVR, CCD camera, IPTV, satellite STB, digital TV STB and other AV output devices