... Tester Application:1.CCTV system installation and maintenance2.Dome camera and All in one camera testing3. ... input1 channel Audio inputPTZ controllerCommunicationRS232, RS422 simplex and RS485PTZ ProtocolCompatible with more than 20 protocols such ... Cord , etc.Digital MultimeterMulti-MeterVoltage, current, resistance and capacitance measuring, continuity testing, diode testing.POWERPower AdapterDC5V, ...