1.CCTV TFT LCDmonitor tester with Optical Power Multi-meter 2 PTZ controller 3 Video signal level test and ... input1 channel Audio inputPTZ controllerCommunicationRS232, RS422 simplex and RS485PTZ ProtocolCompatible with more than 20 protocols such as PELCO-D/P, ... DC Current6.6mA, 66mA, 660mA, 10A Manual rangingResistor660, 6.6K, 66K, 660K, 6.6M, 66MΩ auto/manual rangeContinuityBuilt-in buzzer will ...