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? what kinds of MARS series products support 1 transmitters to 2 receiver? How to add my own LUTs to HollyView App? How can I switch the frequency ? Comments 0 comments Article is closed for comments.