... 4 Channel, Security CCTV Wireless Audio, Video Receiver and Transmitter| 2.4GHz, 4 Channel, Security CCTV Wireless Audio, Video Receiver and Transmitter| Specifications ... stereo, VCR or satellite system through walls floors or ceilings to a TV or speakers in another ... application expansion space. Transmitter can be connected to CCTV camera and achieve different room monitoring, visual monitoring portal ...