CCTV Tester Monitor 3.0 inch Professional BNC In Out TFT LCD PTZ Control OSD Menu 960x240 Resolution 5 useful functions help the installer test and check devices; Video test function; PTZ control and test function; UTP cable test function; Video generating function; RS485 data test function; High resolution LCD screen; Support more than 20 kinds of RS485 protocol; English OSD menu and number buttons; Powered by adapter or rechargeable battery; One full charge means 8 hours of working time; Battery power status display;