Feature: 1. PRACTICAL MULTIMETER: Large LCD display. The voltmeter ammeter can simultaneously detect and display voltage, current, active power 2. 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 parameter 3. POWER OVERLOAD ALARM FUNCTION: Sets the power alarm threshold. When the detected power exceeds the threshold, the backlight and power supply will blink 4. MULTI FUNCTION: Possess back light control function, energy reset function, power overload alarm function, power off data storage 5. DURABLE ABS: Digital AC voltmeter ammeter is made of ABS material, possess impact resistance, scratch resistance, environmentally friendly Specification: Item Type: Digital AC Voltmeter Ammeter Measurement Voltage: AC80-300V Measuring Current: 0-20A Measuring Power: 0-4.4KW Measured Energy Consumption: 0-99999KWh Measurement Frequency: 40-65HZ Power Factor: 0-1PF Timing Range: 0-999 Hours (no load, no time) Display Window: Approx. 41 x 48mm / 1.61 x 1.89in Overload Alarm: Can be set Voltage Alarm: Can be set Wiring Type: Fence type wiring terminal Installation Method: Embedded Product Size(LxWxH): Approx. 68 x 68 x 22mm / 2.68 x 2.68 x 0.87in Panel Hole Size(LxW): Approx. 63 x 63mm / 2.48 x 2.48in. Package List: 1 x Digital AC Voltmeter Ammeter1 x User Manual Note: 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.