The mobile version can be upgraded via the HollyAudio APP.
1. If the firmware is the latest, it will show [!] icon, you can click to check the firmware info
2. If it needs update, it will show [↑] icon, you can click to do the upgrade.
Note:
- The app cannot run in the background during the upgrade which may cause the upgrade interrupted.
- The transmitter cannot be turned off and must be connected to a stable power source during the upgrade.