Optimal Shop New 2.4GHz/5.8GHz RCA AV Sender Receiver Video Wireless Transmitter Cordless IR Remote Signal Support 8 groups of channels.You can select these channels to avoid interference from signals of a wireless router.Support 1 group of AV input signal.Wireless Transmitter Distance 150m in Unobstructive Place or in wide-open area. Wireless transmitter distance 20m in obstructive place such as living rooms that are walled off by 1 wall. It is usually used in wide-open area, not only used in TV BOX or DVD remote operation, but to control TV BOX or DVD remotely via receiver It can support IR remote control at the receiver end to realize the function of wireless control of devices from another place.Supports video transmission of PAL/NTSC system and stereo audio transmission. If you want to watch DVD, DVR, IPTV, satellite STB in different TVs, but do not want to use the long and expensive cables for the devices. This wireless sharing device would be the best choice for you.Fully hardware-designed. There is no need to install software. Plug and play. Simple and convenient. Use 2.4GHz ISM frequency band, multiple selective channels supported for anti-interference from wireless.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. Digital TV set-top box wireless sharing device What are the conditions: the need to open the local digital TV, telecommunications IPTV, the installation of satellite receivers, with a set-top box and has two TV sets above the family. If you have 4 televisions that require video sharing for three of these televisions, you can do this by simply purchasing two "digital TV set-top box wireless sharing" receivers.