5.8G Wireless AV TV Audio Video Sender Transmitter Receiver 300 meters transmission - Purple Use 5.8GHz ISM frequency band. 300 m transmission range without any holdback. 8 groups of selectable channels, it can effectively avoid the interference from router and other wireless device. Support 1 group of AV signal input/ output. Keep Transmitter and receiver setting at the same channel, it can support 1 transmitter and more receivers at the same time.