How to Adjust Volume on Ace 130?
For Batch No. 21B1
Ace 130 does not support volume control on the earbuds themselves. Please use the connected device to adjust volume.
Out of the box, the factory setting for the MFB button is to switch between TV mode on/TV mode off.
However, if you want to use the MFB button to adjust the volume, you can download the Avantree Center App to set it.
How to use the Avantree Center app.
For batch after Batch No. 21F1
To INCREASE Volume: Double-click the main button on the R Earbud.
To DECREASE Volume: Double-click the main button on the L Earbud.
Related link: Where to find Product Name and Batch Number/LOT Number?
Note: Button settings can be changed on app. Please search and download 'Avantree Center' in the app store on your device.