Wattmeter Prism Meter, Electricity Consumption Price with 7 Retro-Illuminated Monitoring Modes and LCD Screen. Electricity Consumption Measurement for Energy Saving, Maximum Power 3680W 【Electricity Meter and 7 Modes】: A total of 7 monitoring modes, this wattmeter manages monitoring time, power, cost, accumulated energy consumption, voltage, frequency, current, power factor, minimum power, maximum power and electricity price. Consider consumption in kilowatt hours with a high power tolerance of max 16A, compatible with 250VAC. 【Backlight and Memory Function】: Electricity consumption, electricity consumption measurement with the integrated backup battery, this wattmeter can retain data in the event of a power failure. Press any key to wake up the backlight for 10 seconds to check the data in the dark. 【Overload Warning】: Wattmeter Digital energy intake, when the current load on the connected device exceeds 3680W, the LCD screen continues to flash \"Overload\" to remind the user and protect the connected device and the wattmeter itself from damage. 【Easy to Use】: Simply select the monitoring mode on the \"FVNC\" button on the energy meter, the \"Cost\" button to set the electricity price per unit, the \"UP\" and \"Down\" buttons to set the price. The \"Reset\" button to clear all settings, adapting to seniors and youth. Suitable for many electrical appliances, Christmas lights, pain machines, coffee machines, computers, game consoles, printers, TVs, hi-fi chains, DVD, ovens, etc. and money / reliably determine the energy consumption of electrical appliances at home and in the office - NOTE: The power consumption of the loaded devices is measured (the unit only records data when the household appliance's labor is greater than 2W;) User Instructions: 1. The wattmeter taken digital energy meter is used to measure the power consumption of household appliances and calculate the cost of electricity. 2. The product has an integrated rechargeable battery. If it is newly purchased or unused; For a long time, connect it to charge it. 3. If the display and response from the buttons are abnormal, you can press the \"Reset\" button to reset the system. After resetting, you must reset the parameters.