Features: Reset function. Allows resetting of abnormal display or button no response. Built-in rechargeable battery can store power and save memory settings when power is off. The power meter is a monitoring and testing instrument that can determine the power consumption and cost of electricity consumed by connected devices, help users track their electricity consumption, and reduce electricity bills and carbon emissions. Through the electricity bill calculation, you can monitor which appliance consumes the most power and how much power your backup appliance consumes. With overload protection function, when the power socket is connected to a load exceeding 1650W, the second LCD will flash. If you receive the product but it is not turned on or displayed, please plug it into the AC power outlet for 10 minutes, and then press the reset button to reset. Press the "Cost" button to directly display the mode 7. If an abnormal display occurs or the button does not respond, you must reset the instrument. You can reset it by pressing the RESET button. Parameters: Color:White Working voltage: AC 120V Working frequency: 60Hz Wide voltage range: 110V-130V Working current: 15A max Power display: 0W-9999W Voltage display range: 0V-9999V Frequency display: 0Hz-9999Hz Current display: 0.0A---15.0A Cost display range: 0.00cost/kWh---99.99cost/kWh Timing display range: 0 seconds ---999​​9 days Total kWh and cost display: 0.000kWh---999​​kWh, 0.00cost---999​​9cost Packing list 1* Electrical Meter Sockets (EU,US,UK Plug is Optional) 1* Instruction Manual*1 Note: 1.Please allow slight size deviations due to manual measurement,measuring methods and tools. 2.The picture may not reflect the actual color of the item because of different photographing light and display monitor.Thanks for your understanding. Energy consumption monitors are used to measure the power consumption, current, voltage, power and cost of connected devices, helping to save energy. 7 display modes can display time, watt, cost, accumulated power, voltage, frequency, current, power factor, minimum-power, maximum power, and price. The large LCD screen with backlight is clear and easy to read. Please read the numbers on the front angle of the LCD screen, not from the side. Electricity price setting. You can set it between 00.00 COST/KWh-99.99 COST/KWh according to the actual situation. The overload setting when the current load power exceeds the maximum value. When the load is powered on, the OVERLOAD letter on the LCD will keep flashing to remind you.