Here are T20 Sound Software updating Guide.
Please download the software by this link:
1, Prepare a micro SD card (8GB-64GB) and format the SD card to FAT32 on the Windows system.
- Unzip the “T20Sound Update Software” file to “T21 Sound update software” folder.
- Please copy the file(mark red) into your microSD card.
- Insert the microSD card into the camera and turn on the camera, the camera will update sound automatically.
- The blue light flashes when sound updating. The blue light goes off when you finish the updating successfully.
- After you update the sound successfully, wait for 7-10 seconds, the camera will restart automatically.