SainSonic SS-630 5.8GHZ 8 Channels AV Wireless Audio Video Transmitter & Receiver 100M Support 8 groups of channels. You can select these channels to avoid interference from signals of a wireless router, etc. The transmitted images and sound is clear. This unit is only compatible with Standard Definition. Wireless Transmitter Distance 50m(164ft) in unobstructive place and 10m(33ft) if there is 1 wall. It is suitable for those places without wall. Supports video transmission of PAL/NTSC system and audio transmission. Fully hardware-designed. There is no need to install software. Plug and play. Simple and convenient. The transmitter and the receiver should be set in the same channel in a pair and can be used in the modes of point-to-multipoint or multipoint-to-multipoint.