固件升级提醒：
1.解压文件，将ECHOXX.IMG文件拷入ECHO本机内存根目录，安全退出设备；
2.如机器有插TF卡，请先将TF卡取出，重启自动升级；
Firmware Upgrade Reminder:  
1. Unzip the file and copy the ECHOXX.IMG file to the root directory of the ECHO's internal memory. Safely eject the device and restart it to begin the automatic upgrade.  
2. If you encounter any issues, please feel free to contact us. 

----ECHO V1.2.0-----
1.修复在按键B模式且熄屏状态下调节音量是按键A模式的问题。
2.优化律动风格的显示效果。
3.优化第4、5级音量顺滑度。
4.其他系统优化。
----ECHO V1.2.0-----
1. Fixed an issue where adjusting the volume in button B mode and screen-off state would incorrectly operate as button A mode.
2. Optimized the display effect of the rhythm style.
3. Optimized the smoothness of level-4 and level-5 volume.
4. Other system optimizations.





