520TVL High Resolution 90deg View Angle Mini CCTV Camera 0.008Lux.MC900D-V9- 1) CCTV cameras can be used directly with a standard TV/VCR or RCA video monitor; 2) To view more than one CCTV camera on your TV/VCR you will need a quad or multiplexer; 3) To view on your computer or laptop you will need a DVR card or USB; ) A standalone system that records is a standalone DVR; 5) CCTV wired cameras can add a 2.4GHz wireless transmitter module,then it can work with wireless receivers.