1. Format the TF card first. The format of the TF card should be the format of FAT32.

2. Put the two firmwares "FW96658A.bin" into the root directory of the TF card.

3. Insert the upgrade card that copies the upgrade firmware into the TF card holder of the host. The USB interface of the host or the USB interface of the bracket is used for DC 5V/1A direct power. After the host is powered on, it automatically enters the upgrade state. During the upgrade process, the host is upgraded. The display is black
    The blue light inside the machine flashes quickly, until the boot screen appears and then enters the video preview interface.
   
4. Format the upgrade card on the recorder host or computer (if you don't have a card, you will enter the upgrade state again after the next boot)

Tips: During the upgrade process, it is strictly forbidden to cut off the power in the middle of the process. The brush machine is risky and the operation needs to be cautious!