Q：Bluetooth connection failed?
A：1. Does the phone's operating system meet the following requirements: Android 6.0 and above, iOS 11.0 and above;
2. Confirm whether the device is still connected to another mobile phone;
3. Check if your phone's Bluetooth is turned on and working properly. We recommend closing all apps, restarting Bluetooth, and then connecting again.
4. Some devices cannot connect properly when in low power mode;
