SMD Audio Multi Meter / Hand Held Amplifier Dyno - Real time wattage tester DC Voltmeter: -100 Volts to +100 Volts AC Voltmeter: 0 - 150 VRMS / AC Ammeter: 0 - 100 ARMS AC Apparent Power: 0 - 15,000 / VA Power Factor: 50 - 100% Frequency: 10 - 20,000 Hz / AC Impedance: 0 - 200 Ohms Real time wattage / True Power Dyno: 0 - 15,000 Watts