【11 Monitoring Modes】This power meter can accurately monitor your home appliances. The monitoring parameters include power (W), accumulated power consumption (kWh), voltage (V), frequency (Hz), current (A), CO2 emission (kgCO2), power factor, minimum and maximum power, electricity cost, and cumulative time. 【Backlit LCD Display】This power meter features a large, clear backlit LCD display. It is easy to read and use in dark areas. The backlight duration is 10 minutes (default). Press the DOWN button to turn off the backlight. Press any key to turn on the backlight. 【Data Memory】KETOTEK power meter has a built-in high-precision chip, which can automatically save data in the event of a power outage. Data is stored permanently. A reset key can clear all data. Use the MODE+DOWN keys to clear the measurement data, but keep the measurement settings. 【Unplug to Read and Use】You can remove this plug-in energy meter from the socket to adjust and view the data. It is suitable for various household appliances, including toasters, coffee makers, refrigerators, air conditioners, computers, game consoles, printers, TVs, stereos, ovens, etc. 【Multiple Protection】When the power, consumption, or energy cost reaches the set value, "OVERLOAD", "KWh ALARM" or "COST ALARM" will flash on the display and LED indicators to warn users. The default overload power is 3680W (adjustable from 0 to 3680W). Ideal for monitoring the energy consumption of household appliances.