330 is a multi-function CCTV tester device. It’s an excellent helper and partner for the installer in project case. It can test the camera video, PTZ function, UTP cable work status, operated with visual and simple OSD menu, for resolving lots of project problems, it make the installation work become more convenient and higher efficiency. The new generation tester 330 has more excellent functions as power to camera, multi-meter, Video signal attenuation analyzing, updated RS485 analyzing, screen brightness adjustable etc. Its for sure it can help customers much more when they use it for installation and problem-checking work.