Bluetooth Firmware For K5 SE Windows Version (JIS Layout)

Attention: This OTA Bluetooth Firmware Tool Tutorial is only for the K5 SE keyboard JIS Layout (Only applied to the Keyboard Windows option and keyboard wireless Bluetooth mode).

The keyboard Bluetooth firmware can be used in all K5 SE JIS keyboard versions ( Such as Hot-swappable / White backlight / RGB backlight / Mechanical switch/ Optical switch)

Note: If everything works fine with your keyboard. Please don’t update the Bluetooth firmware. There is a chance it can damage your keyboard.


1. Download the File (Make sure to save them on the desktop)

OTA Tool

K5 SE Wins version keyboard Bluetooth firmware (JIS).hex

2. Switch the toggle to the Bluetooth mode and connect the K5 SE to your device. (Make sure K5 SE has enough battery.)

3.  Unzip the OTA Tool file and click the "Setting" section.

4. Edit the PID code: ProductID for K5 SE JIS layout is 0252 (for RGB version) / 0255 (for white backlight version). Then save the file after you edited the PID code. 

5. Open the first file "Bluetooth HID Firmware Upgrade V2.0 Beta3" and start the wireless programming process. 

6. Click the "Browse" option and choose the "K5 SE Wins version keyboard Bluetooth firmware (JIS).hex" file. (Make sure the file is saved on the desktop.)

7. If the file shows "No Connection!" then it means the PID code does not match the program. 

8.  Then click the "Upgrade" option and start downloading the OTA tool. Then test the keyboard.

9. If your K5 SE keyboard cannot work after downloading the QTA tool, then try to close the file and reconnect your K5 SE keyboard. 

10. Reset your K5 SE keyboard. (Press the Fn+J+Z for 4 seconds)

11. Delete and disconnect the keyboard from your computer.

12. Try to connect the keyboard to your computer again and it should be fine. If not, then repeat step 11.