Energy and Money SavingUse this plug power meter to monitor the power consumption and electricity cost of your home appliance in real time, helping you save electricity and money. REMARK: We offer user manuals in French. You can also contact us by email or order page to receive a PDF copy of the user manual, thank you. 7 Monitoring ModesThe power consumption meter can monitor the voltage ( V), current (A), power (W), energy (KWh), power factor, price, minimum power and maximum power of the connected equipment. Overload Warning When the current load of the connected device exceeds 3680W, BESVIC Socket Power Meter LCD will keep flashing “OVERLOAD”, which helps protect the device from damage and protect your safety.< /p> Easy to use Just press "FVNC" button to choose monitoring mode. Press the "COST" button to set the electricity unit price from 00.00 COST/KWh ~ 99.99 COST/KWh. The "UP" and "DOWN" buttons to adjust the price. The "RESET" button to erase all settings. Built-in batteryBuilt-in battery to retain the last setting and store electricity even in the event of a power failure, Large LCD display is easy to recognize even at long distance.