... Adjust PAL or NTSC Can supply power to multi-function cctv testerCCTV Tester Can work 15hours!cctv tester cctv security testerWhite, Yellow, Cyan, Green, Pink, Red, Blue ... 750mA , can Supply Power to Camera!!!! Audio Tester: 1 channel Audio Input SpecificationMODELST89B-4 CCTV Security TesterLCD adjust Adjustable brightness, contrast, color ...