Open the battery cover on the back of the Xiaomi Body Composition Scale S400 and press and hold the Reset button for 7 seconds. When 0.0kg is displayed after all the LEDs light up, the factory settings will be restored.
Note:
1. Restore the factory settings will delete the data and APP binding information on the device. The data not synchronized to the APP will be cleared. Please operate carefully;
2. The Delete Device function in the Mi Home/Xiaomi Home APP can only be unbound from the device in the cloud, and the device needs to be reset before it can be discovered and bound.