... 6421A/B/C/D/E optional)1) 1/3” SONY image sensor, 420/480TV lines optional, effect pixels is 752*582 ... at the same channel, it is ok after monitor display image from 4 camerasVarious cctv camera, ip camera, dvrs and add ... . welcome to inquiry!! Cctv camera, ccd camera, cctv system, security system, surveillance equipment, surveillance system, color cctv camera, color ccd camera, cctv products, ...