Dual rate: In dual rate mode, you can set two rates at the same time, allowing you to calculate and compare electricity bills at different times. For example, set different electricity rates day and night, monitor appliance costs more accurately, saveenergy and money.Accurate and multi-functional: After the electricity price is input to the electricity meter, it can accurately measure the energy consumption of the connected electrical appliances, and directly display the electricity price withoutcalculation. With 7 modes, time, kWh, voltage, cost, etc. can be clearly displayed. (standby power consumption measured from 1 W)Backlit LCD screen: 2.5-inch screen, no magnifying glass required, easy to understand and operate. Thanks to the backlight,the numbers on the screen are clearly visible even in dark places or tight corners.Backup power function: built-in rechargeable battery. In the event of a power failure, the energy cost table retains its data and settings for up to 3 months as longas the emergency power supply is fully charged.Overload Protection: Power Display: 0-3680 W (standby power consumption is measured from 1 W). When the load exceeds 3680W, the screen will flash OVERLOAD to warn the user.Dual rate mode allows you toset two rates at the same time to calculate and compare electricity bills at different times.Wide viewing angle:This LCD screen has a wide viewing angle. Whether you're looking up, down, left or right, you can clearly see what's on the screen.Wideapplicability:With a power range of 0-3680W, it is ideal for monitoring the electricity bill of various household appliances such as refrigerators, dryers, home office equipment, balcony solar systems, and more.