... -function cctv testerCCTV Tester Can work 15hours!cctv tester cctv security testerWhite, Yellow, Cyan, Green, Pink, Red, Blue and Black color ... Camera!!!! Audio Tester: 1 channel Audio Input SpecificationMODELST89B-4 CCTV Security TesterLCD adjust Adjustable brightness, contrast, color of LCDSignal modeNTSC/PAL ...