Energy monitoring: Measure and calculate the energy consumption and costs of your connected devices. Total 7 monitoring modes, this socket power meter supports monitoring time, power, cost, cumulative power consumption, voltage, frequency, current, power factor, minimum power, maximum power and electricity price. Overvoltage Protection: Electrical voltage: 230V AC 50Hz, Maximum current: 16 amps, Maximum power: 3680W. When the total power exceeds the rated power of 3680W of the outlet power meter, "Overload" will flash on the screen to warn you that the device must be disconnected from the power supply to avoid overheating. Easy to use: just press the FVNC button on the outlet power meter to select monitoring mode, the COST button to adjust the device electricity price, the UP and DOWN buttons, to adjust the price. RESET button to erase all settings. Dual rate mode allows you to set two targets at the same time to calculate and compare electricity costs at different times. VERSATILE PARAMETER MEASUREMENT: With a variety of measurement parameters such as power (W), energy (KWh), voltage (V), current, power factor, cost and minimum and maximum power, this energy cost meter socket offers you the most basic data about your household electricity. Measures and calculates energy consumption (0.00 - 9,999.9 kWh), active power (0.1 - 3,680 watts), mains voltage (200 - 276 volts) and energy costs (0.00 - 99.99 ), easy to read and record. Versatile: Easily calculate the energy consumption of devices. Suitable for many electrical appliances, bread machine, coffee machine, computer, game consoles, printer, TV, Hi-Fi, DVD, fan heater, Blu-ray player, oven etc.