Multi-function CCTV tester with 3.5-in LCD display will save you time and money on your very next CCTV installation, not only can you see the camera video to adjust focus or the varifocal lens, but you can also power the camera directly from its lithium ion battery, that means only one trip up the ladder to mount the camera, test cables and adjust settings, plus its a complete multimeter and UTP cable tester all in one tool.