DIVIMATH HDZero Freestyle - VTX Update Guide; VRX Update Guide; Steps to Update Hdzero VRX; Steps to Update Shark Byte VRX

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(2) Unzip content of RX5.1.Revddmmyyyy.zip onto SD-card, insert SD to the module;
(3) Move the switch to Bottom position with tweezers (not included);
(4) Power on goggle module, the red LED will be lit;
(5) Wait for red LED to turn off, on, and then off again (it may take over 10 min to complete);
(6) Power off, and move the switch to TOP position with tweezers;
(7) Repower goggle module, it should now boot up normally.
Top position
Bottom position