Key operation instructions 1. Click the "+" or "-" button to switch to other functional test interfaces 2. Long press the "M" key to enter the background, click the "+" or "-" key to switch between Chinese and English interface display, Click the "M" key to switch to the next option, click the "+" or "-" key to set Numerical value 3. Long press the "+" or "-" button the device turn ON or OFF 4. Click the "+" or "-" button to switch to the electricity bill setting interface, and then click the "M" button to set the unit price of the electricity bill. Click the "+" or "-" button to adjust the value. Long press "M" key to confirm OK! 5. Click the "+" or "-" button to switch to the security protection setting interface, and then click the "M" button to set the overvoltage protection, overpower protection, and undervoltage protection, click "+" or "-" key to adjust the value, long press the "M" key to confirm OK! NOTES: This version is the WIFI version, the WIFI indicator will flash when it is turned on, but the Bluetooth indicator will not be displayed! 1. How to obtain AQI, PM2.5, air temperature, humidity data, calendar data? A: AQI, PM2.5, humidity, temperature, calendar and other data display are obtained through the Internet! 2. Are there any charges for data cloud? A: It's free! 3. What APP is supported and where can I download it? A: Currently Tuya APP and Smart Life APP are supported, which can be downloaded in major application markets (Google Play for Android, Apple App Store for IOS) 4. Does this currently support computer APP? A: The WIFI version does not support computer APP, but the Bluetooth version can support computer APP (please check the description of the Bluetooth version for details) 5. What types of mobile phones are supported? A: Currently support Android phones and Apple phones! 6. How big is the shunt? A: The built-in 100A shunt does not require an external CT! 7. Is it single-phase or three-phase? A: At present this is a single-phase electricity! 8. Is this product a 2.4G or 5G network? A: This model is the WIFI version, supports 2.4G network, currently does not support 5G! 9. Regarding the relay, what is the difference between the WIFI version and the Bluetooth version? A: Built-in 100A relay, WIFI version include relay, Bluetooth version does not include relay. 10. Does the product have power-off memory? A: Data has power-off memory, switch mode has no power-off memory. Once the power is turned on, the relay is closed, and the screen will normally display on that the connection is not disconnected!