... TFT-LCD Tester with Monitor / PTZ Controller / Video signal generator ST-895 ST-895 PTZ Tester with 3.5 inch ... 0.001nVVOptical interfaceFC/PC , SC ST optionalDigital multimeter (independent circuit board with the function of protection)AC/DC ... range-66000 ~ +6600PTZ control testCommunication InterfaceSupport RS232/RS485 simultaneouslyProtocolcompatible with Pelco-D / P, Samsung, Panasonic, Lilin, Yaan, ...