1, you can download the latest upgrade package from the official website of KangCai or related forums, generally compressed in Rar format, you need to decompress the upgrade file.
2. Copy the unzipped upgrade file to the root directory of the USB flash drive and make sure the file name is "update.pkg".
3. Insert the USB flash drive into the USB port of the audio system, at this time the audio system will automatically detect the upgrade file in the USB flash drive.
4. Press the "Volume +", "Volume -" and "MODE" buttons on the panel of the audio system, and then press the power switch, the audio system can be enter the upgrade mode.
5, wait for the audio system to detect the upgrade file in the U disk, press the "Play/Pause" button on the panel, the system can start to upgrade. During the upgrade process, please do not disconnect the power or pull out the USB flash drive.
6. After the upgrade is complete, the audio system will automatically restart and indicate that the upgrade was successful. At this time, you can pull out the USB flash drive and reset the parameters of the audio system to enjoy the latest features and performance.