... , Video Receiver and Transmitter| 2.4GHz, 4 Channel, Security CCTV Wireless Audio, Video Receiver and Transmitter| Specifications: Frequency: 2. ... sounds and picture from your stereo, VCR or satellite system through walls floors or ceilings to a TV or ... Wider application expansion space. Transmitter can be connected to CCTV camera and achieve different room monitoring, visual monitoring portal, even ...