La procedure :
The PDF is the instruction sheet on updating the firmware. In a nutshell, format a microSD card and drop the SD_CarDV.bin file onto it. Insert into the DRV and power up the goggles. Long beep means the update is done. There's also instructions on checking and updating the goggle fw version. .0346 is the old version, .0828 is the latest one. "Upgrading▪TF card upgrading1. Format the TF card and load in the upgrading file SD_CarDV.bin into TF card root directory, insert the TF card into the goggles then power it on, the goggles will get into automatic upgrading status and keep beeping, the upgrading will end up with a long alarming. Taking the TF card out to check if the upgrading file SD_CarDV.bin is still there, if not, the upgrading is success, then power it off and restart ; If file is still there, please retry.2.For upgrading failure(wrong processing, TF card took out, goggles powered off), imperative upgrading operation is necessary.a. Power off the goggles, format the TF card and load in the imperativeupgrading file SdFwCode.bin and upgrading file SD_CarDV.bin.b. Insert the TF card into the goggles then long press DVR button verticallyand power it on, release the DVR button when it start beeping, and the upgrading begin, the process will end up with a long alarming. Formating the TF card and power off the goggles and restart.3. Check whether SD card version upgrading succeed or not.First insert the SD card, long-press five-direction DVR button vertically to enter REC mode, long-press five-direction DVR button to the right to enter play video list, long- press DVR button to the left to enter play back menu item, short press DVR button to the right to enter gerneral setting, and finanlly short press DVR button vertically to see the FW Version information. If it is shown 0828 version Version:0003.2018.0828, ungrading successfully. If it is shown 0346 version Version:0002.0001.0346, upgrading failed, please retry.
Voilà chef 🙂