How to fast and easily identify the channels with interference? Hollyland Tech November 30, 2020 11:09 Long press the "ok" button into the menu page on RX Select “Channel Scan” “√” means the channel is clear of interference while “×” means it is with interference Related articles Did the APP support transmission audio? Can we use mushroom antenna on the MARS 400S ? How to change the video input and output format? Comments 0 comments Article is closed for comments.