Feature: Display line power. Display and store the accumulated total power. Display and store the price of the total power. Fine workmanship and good performance. Easy to use. Durable in use. Data Display: Press the MODE button, the data is displayed as follows: W-KWh-Price-COST / KWH 1). Plug in the socket and turn on the power, the meter will display the active power. 2). Press the MODE button again and release it, the meter will display the accumulated KWh. 3). Press the MODE button again and release it, the meter will display the total power. 4). Press the MODE button again and release it, the meter will display COST / KWH. Set fee/KWh price: 1). Press the SET button when COST / KWH is displayed, the first number COST / KWH flashes, press the UP button to set. 2). Press the SET button again and release, the second number COST/KWH flashes, press the UP button to set. 3). Press the SET button again and release, the third time COST/KWH flashes, press the UP button to set. 4). Press the SET button again and release, the fourth time COST / KWH flashes, press the UP button to set. 5). Press the SET button again and release, the decimal point COST / KWH flashes, press the UP button to set.