Dual Tariffs & Single Tariff: Innovative design, electricity usage meter can set two rates at the same time. Double tariffs are often used in billing areas with different billing rates. Electricity consumption meter allows for more accurate calculation of electricity usage per cycle Good Helper for Money Saving: With the help of energy saving power meter, you can make certain how much standby appliances cost, power consumption when the device is in use, whether the appliances are secretly using electricity. Power meter uk plug is a practical tool, help you to know the energy cost of your home appliances.