Smallest 520TVL High resolution Video Audio CCTV camera 0.008LUX Night vision...MC901D 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.