... fibre-optical power .CCTV Tester, CCTV Security tester, Ethernet cable tester, Network cable tester ,PTZ tester, CCTV ... , SC ST optionalDigital multimeter (independent circuit board with the function of protection)AC/DC Voltage0-660V ... range-66000 ~ +6600PTZ control testCommunication InterfaceSupport RS232/RS485 simultaneouslyProtocolcompatible with Pelco-D / P, Samsung, Panasonic, Lilin, Yaan, ...