Digital Energy MeterSimply connect the device to the power source via the energy meter socket and you can monitor your electricity loss in real time. Save energy and money, and protect the environment. Added backlight, easy to read and record data in the dark. 7 Modes for Accurate MeasurementPower Meter Socket is equipped with an LCD display for easy data reading. Consumption meter with 7 modes are used to monitor power, voltage, frequency, current, power factor, cost and minimum and maximum power, accumulated power. Efficient and Easy to UseWatt meter socket energy meter is perfect for household appliances, such as computer, washing machine, TV, game console, router, refrigerator, kitchen appliances, aquarium lighting and other home appliances to maximize energy savings and money. User FriendlyAdded backlight for clearer view of numbers and letters, easy to record data in the dark. Besides, it is more convenient to set and program the consumption meter. Super Quality and GuaranteeWhen the total power exceeds the maximum power of this power meter (3680W), the LCD screen flashes and displays "OVERLOAD".