Features: 1. 7 Monitoring Modes: A total of 7 monitoring modes, this power meter for socket supports monitoring time, power, costs, accumulated power consumption, voltage, frequency, current, power factor, minimals power, maximum power, and electricity price. 2. Real Time Monitoring: Simply connect your electrical devices to this power consumption meter. The energy meter starts with monitoring and recording the power consumption and the electricity costs of the connected device, helping you know the electricity costs of your household appliance. 3. Backlight and Memory Function: With the built-in buffer battery, this power meter can store data in the event of a power failure. Press any button to wake up the backlight for 10 seconds to check the data in the dark. 4. Overload Warning: When a current load of the connected device is detected of more than 3680W, the LCD screen constantly flashes "Overload" to remind the user and protect the connected device and the current meter socket itself from damage. 5. Easy To Use: Simply press the "FVNC" button from the energy cost meter to select the monitoring mode, the "COST" button to adjust the power price of the unit, the "UP" and "DOWN" buttons to adjust the price. "Reset" button to delete all settings, suitable for seniors and boys. Specification: Color: White Measure current accuracy: +/-2% Measure power accuracy: +/-2% Battery: 3.6V NI-MH, rechargeable battery Power supply: 230V AC 50Hz Max.load: 16A, 3680W Current: 0.0A - 16.0A Product Size: 12.7 x 6 x 7.33cm Product Weight: 193.2g Optional: Backlit, Ordinary Package Included: 1 x Electricity Meter For Socket