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Our this Power Meter Buster is a monitoring and testing instrument which determines the power consumption of a connected appliance and the cost of the electricity consumed. Evaluate your home appliance efficiency to reduce your electricity bill. It enjoys 8 display modes as below: 1. Time/Watt/Cost Display; 2. Time/Cumulative electrical quantity Display; 3. Time/Voltage/Frequency Display; 4. Time/Current/Power Factor Display; 5. Time/Minimum Power Display; 6.Time/Maximal Power Display; 7.Time/Price Display; 8. Overload Display. Package Included: 1 piece energy meter with outer box