Important User Guide 1. Click the “+” or “-” button to switch to other bump 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 "-" button to set the numeric value 3. Long press the “+” or “-” button to turn on or off the device 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 Adjust the value Long press the “M” button to confirm OK! 5. Click “+” or “-” button to switch to safety protection setting menu, and then click “M” button to set over-voltage protection, over-voltage protection and under-voltage protection. Click "+" or "-". key to set the value, long press the "M" key to confirm OK! REMARKS: This version is the WIFI version, the WIFI indicator flashes when it is on, but the Bluetooth indicator does not show!