How to avoid fan noise? Hollyland Tech December 08, 2020 12:03 Updated Hollyland had been Collecting feedback from the end-user about the Fan sound all the time. So with the new 400S PRO version, it is supported to adjust the Fan Mode in different working environments. Operations: Hold the middle button on TX or RX. Select the “Fan Speed” option Choose the SLOW or OFF mode Menu Page : Fan Settings Page : Related articles How to do the App Connection？ How to power on the MARS 400S Pro? How to set them up when multiple sets of MARS 400S Pro are used at the same location? UPGRADE How to add my own LUTs to HollyView App? Comments 0 comments Article is closed for comments.