Features: - With dual rate mode, you can set two tariffs at the same time to calculate and compare electricity costs at different times. - This saves more time on conventional electricity calculations and makes it easier for people to calculate the devices in their household better. - Power range 0-3680 W, ideal for monitoring the electricity costs of various household appliances such as refrigerators, dryers, home office appliances, balcony solar systems, etc. How are the cost per power unit? 1. Long press the 'Cost' button until the small text 'Cost/kWh' flashes in the lower right corner. Short press the 'Fvnc' button to switch the number bit 00:00 from left to right. 2. Press the 'UP' or 'DOWN' button to set the number. After the unit cost is set, briefly press the 'Cost' button and then the 'Fvnc' button to exit the menu. 3. FVNC: Press the 'Fvnc' button to select the monitor modes. Technical parameters: Maximum load current: 16 A. Maximum load: 3680 W. Voltage: 230 V AC / 60 Hz. Maximum load current: 16 A. Maximum load: 3680 W Performance accuracy: 2%. Total KWh display: 0.000 KWH ~ 9999 KWH Total cost display: 0.00 ~ 9999 Price range: 00.00 ~ 99.99 Package contents: 1 x power meter for socket. 1 x user manual.