7 Monitoring ModesTotal 7 monitoring modes, this power meter for outlet supports monitoring time, power, cost, cumulative power consumption, voltage, frequency, current, power factor, minimum power, maximum performance and electricity price.Real-Time MonitoringSimply connect your electronic devices to this power consumption meter. The energy meter starts monitoring and recording the power consumption and electricity cost of the connected device, helping you to know the electricity cost of your home appliance.Backlight and memory function With the built-in backup battery, can This power consumption meter will retain data in the event of a power failure. Press any key to wake up the backlight for 10s to check the data in the dark.Overload Warning When the current load of the connected device is more than 3680W is detected, "OVERLOAD" will keep flashing on the LCD screen to remind the user and protect the connected device and the power meter socket itself from damage.Easy OperationJust press the FVNC from the energy cost meter, to select the monitoring mode, the button COST, to set the electricity price of the unit, the buttons UP and "DOWN" to adjust the price. "RESET" button to clear all settings, suitable for seniors and young. Product information >>>>>>HOW TO USE? How is the cost per unit of electricity determined? Long press the Cost button until the small text Cost/kWh flashes in the lower right corner. Press briefly press the Func key to change the digit bit 00:00 from left to right Press the up or down button to set the number After the item cost is set, briefly press the "Cost" button and then the "Func" button to open the menu to exit. FUNC:Press the Func key to select monitor modes Reset:A tiny button in the bottom right corner of the display that you might prick with the included needle ;ssen. Electricity meter for socket Easy Application This power meter socket has 7 monitoring modes for multiple data monitoring, real-time monitoring of your home appliances consumption of energy and money save. Compact size design for space-saving, ideal for many devices, such as computer, air conditioner , refrigerator, dishwasher, microwave, etc.