Features: Easily monitors the power consumption and costs of your electrical appliances. Overload Protection: Once the whole power exceeds the power of monitors, LCD will display "OVERLOAD" with booming noise to remind the user. To set the amount charged per kWh in your house, you should plug your electronic appliance with the meter on the wall, and then it will start calculating the amount when the appliance works. It is easily calculate the power consumption of devices. Such as computers, game consoles, printers, TVs, routers, ovens, bread machines, set top boxes, fans, air conditioners, DVDs and more. Constructed from plastic, this power meter socket is designed to withstand regular use while maintaining its functionality. Specifications: Material:ABS Type:US Size:Approx.135mm/5.31''x65mm/2.56'' Package Includes: 1Piece Power Consumption Monitors note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.