Feature:1. PRACTICAL MULTIMETER: Large LCD display. The voltmeter ammeter can simultaneously detect and display voltage, current, active power2. ELECTRICAL PARAMETERS TEST RANGE: Voltage test range AC80~300V; Current test range 0~20A; Power test range 0~4.4kW; Energy test range is 0~99999kWh. This voltmeter ammeter is suitable for most places, please do not exceed the rated parameter3. POWER OVERLOAD ALARM FUNCTION: Sets the power alarm threshold. When the detected power exceeds the threshold, the backlight and power supply will blink4. MULTI FUNCTION: Possess back light control function, energy reset function, power overload alarm function, power off data storage5. DURABLE ABS: Digital AC voltmeter ammeter is made of ABS material, possess impact resistance, scratch resistance, environmentally friendlySpecification:Item Type: Digital AC Voltmeter AmmeterMeasurement Voltage: AC80-300VMeasuring Current: 0-20AMeasuring Power: 0-4.4KWMeasured Energy Consumption: 0-99999KWhMeasurement Frequency: 40-65HZPower Factor: 0-1PFTiming Range: 0-999 Hours (no load, no time)Display Window: Approx. 41 x 48mm / 1.61 x 1.89inOverload Alarm: Can be setVoltage Alarm: Can be setWiring Type: Fence type wiring terminalInstallation Method: EmbeddedProduct Size(LxWxH): Approx. 68 x 68 x 22mm / 2.68 x 2.68 x 0.87inPanel Hole Size(LxW): Approx. 63 x 63mm / 2.48 x 2.48in.Package List:1 x Digital AC Voltmeter Ammeter1 x User ManualNote:1. The voltmeter is easy to connect, suitable for indoor use, do not use outside.2. Connect the cables according to the wiring diagram.3. This product is not suitable for inverter, unless you have tested the inverter waveform and frequency is completely consistent with the mains, and there is no excessive burr interference.4. The voltmeter cannot be used for autotransformers, thyristor circuits or loads.