Effective range: Up to 1000 meter line of sight, 80 meter with walls in between. * 4 channels provided as options to ensure clear reception of video and audio. * Stereo audio function: Perfect for using with DVD, camcorder, satellite system, or stero. Wide band characteristics of fine audio and video receive quality * Transmitter can connect any AV devices such as CCTV camera, VCR Recorder, DVD player, Video camera ...e.t.c. Low power consumption, high sensibility. * Input and output: RCA Jack for Video and Audio.