Power Consumption Monitor: Simply plug the power meter between the device and an electrical outlet, and you can know exactly how much electricity is used by individual items in the house. If you are trying to reduce your electricity bills, this practical gadget will definitely help you! Functional and Useful: It has a simple user interface with many information settings, including power (W), energy (kWh), current (A), voltage (V), power factor, cost, maximum power, minimum power, etc. to monitor the power consumption of household appliances. Overload Alarm: When the load exceeds 16A or 3680W, there will be a flashing "OVERLOAD" icon on the screen, so you know which device is consuming a lot of power, or in case of a problem. This greatly helps to ensure electrical safety and minimize losses. Backlit LCD Display: The power meter is built with a large backlit LCD digital display that can be seen from a distance and is very easy to read in good light or in the dark. Battery Powered, Data Stored: The reader itself comes with a small battery that can store the information if you unplug it. Don't worry about losing your data.