Video instruction about updating the K19: https://youtu.be/q-5kwBWNJ4E 

Updated at 2026-09-16

K19 MCU V165 firmware download link: Click here

K19 MCU V165 firmware content:

1. Added custom function menu for remote FN keys, selectable in system settings.

2. Added a large pop-up icon to display the volume level when adjusting the volume.

3. Added Theme 2 and Theme 3.

4. Added "Menu Display" setting to enable or disable menu wrap-around.

5. Fixed an issue where EQ and related parameters did not take effect upon first enabling EQ.

6. Fixed volume output mismatch after switching output modes.

7. Other performance optimizations and bug fixes.

1.新增遥控器FN键自定义功能菜单，可在系统设置中选择

2.新增调节音量时，音量数值大图标弹窗显示

3.新增主题2和主题3

4.新增“菜单显示”设置项，支持设置菜单是否循环滚动

5.修复首次打开EQ后均衡器等参数不生效的问题

6.修复切换输出模式后，音量输出不匹配的问题

7.其他Bug修复

Updated at 2024-07-19

K19 MCU V146 firmware download link: Click here

K19 MCU V146 firmware content:

1. Added the “Knob Control” option of setting the cursor to move either forward

    or backward when turning the menu knob.

2. Added RGB indicator light settings, including self-defining the light brightness, following

    temperature or volume, and self-defining light color.

3. Added a function of waking up the screen by turning the volume knob after the screen is

    off.

4. Added a function of self-defining the EQ name.

5. Added Japanese as a system language.

Note: The second and fourth points require updating the FiiO Control APP, and the

          characters for self-defining names are limited to English letters, numbers, and

          symbols.