Note: When you click the links below to download the firmware, it indicates that you have already read and agreed to the  Open source licenses.

How to upgrade the FW1:

Please read this video for help: https://youtu.be/6e3JaCE7Fsk

FW1 V0.2.7 firmware download: Click here

The following changes and improvements have been made to the V0.2.7:

1. Fixed the issue where distortion would happen to low frequencies in some states.
2. Lowered the volume of the prompt slightly per users advice.