The Power Guard has a smart socket consisting of an energy metering ASIC and a large LCD. It displays various electrical parameters such as V, A, kW, PF, kWh & EUT etc. It is useful in monitoring energy quality and consumption. This power guard not only can be used as a measuring equipment for teaching, but also can be used in measuring household appliances, such as air conditioner, refrigerator, and microwave oven. It's applicable to environments like home, rental estates, office, and laboratory.