The RF-Link AVS-5813 is a 5.8 GHz wireless receiver. It's designed to work in tandem with RF-Link's AVS-5811 transmitter. This device receives wireless vivid video and hi-fi stereo sound from a VCR, TV set, LD, DVD, VCD, Satellite Receiver, or cable set top box to any TV or monitor. It can also be used in conjunction with a camcorder or CCD camera and turns into a wireless security monitoring system. The signal can go up to 400' clear line-of-sight and even penetrate walls.