... outputDC12V, 1AAudio TestAudio input1 channel Audio inputPTZ controllerCommunicationRS232, RS422 simplex and RS485PTZ ProtocolCompatible with more than 20 protocols such as PELCO ... .Digital MultimeterMulti-MeterVoltage, current, resistance and capacitance measuring, continuity testing, diode testing.POWERPower AdapterDC5V, 2ABattery1 pcs Lithium Ion Polymer Batteries, 3.7V ...