AutoGuard GMSR1 Liteline TV/PC Wireless Receiver with SD Card Capable of monitoring up to 4 different motion tracker units and records video/photo feed onto a 1GB SD memory card Can be used to view the transmission from the motion tracker units onto a TV Unobstructed effective range of approximately 100-meters Aluminium and molded polycarbonate construction makes this wall-mounted fixture durable and weather-resistant 4 channels are available to avoid interference