The volume is too low or cannot be adjusted. What should I do?

Volume adjustment is different in the two modes:

1. When using them in Sleep mode, the volume of the sleep sounds can be adjusted via the soundcore app or by tapping on the earbuds (when using two earbuds together, the default is three taps on the left earbud to decrease volume, and three taps on the right earbud to increase volume, users can customize the Tap function in the soundcore app). 

2. When using them in Bluetooth mode, you need to turn on volume synchronization via the settings on your phone.  

How do I adjust the volume in Sleep mode?

1. Adjust the volume bar manually in the soundcore app. You can only adjust the volume in the soundcore app.

2. You can adjust by tapping on the earbuds (when using two earbuds together, the default is three taps on the left earbud to decrease volume, and three taps on the right earbud to increase volume, users can customize the Tap function in the soundcore app)