1.CCTV monitor Tester 2.2.8" LCD screen 3.test video, RS485 ... CCTV monitor testerFeatures:Low power consumption, 10 hours working timeChinese / English operate menu, simple, easy and beautifulThe brightness, contrast ratio, color saturation ... X 240 resolutionDisplay screen adjust:The brightness, contrast ratio, color saturation are adjustableVideo input:1 BNC isolation inputVideo output:1 BNC ...