Electricity Usage Monitor: Just plug the meter between the device and the power outlet, you can accurately determine how much electricity a single item in the house is using. If you want to save more money on your electricity bill, this handy gadget will definitely help Overload Alarm: Once the load exceeds your set power value of 3680W or 16A, a flashing overload icon will appear on the screen, letting you know which device is consuming high power. This guarantees the safety and the maximum consumption of electricity of the households. It helps a lot to reduce the losses. Data retention function: the player uses a built-in battery, even if the player is unplugged from the socket, the last data will be saved. Don't worry about data loss due to sudden power failure, it can also help you control power consumption of electrical equipment and ensure electrical safety. backlit LCD display: The power meter has a large integrated backlit LCD digital display that is visible from a distance and easy to read in bright or dark environments. Suitable for various devices: for example, computers, game consoles, TVs, printers, routers, DVD / Blu-ray players, etc. are all very suitable and can reliably detect the power consumption of home and office electronic equipment. Packing list: 1 piece of electric energy meter