"✈️  DJI Mini 4 Pro – Visual Line of Sight vs Transmission Range “When your eyes give up long before the tech does” 👀  The Basics – What VLOS * Really*  Means Visual Line of Sight (VLOS) is the rule that governs almost all recreational and professional drone flying. It’s deceptively simple: You must be able to see your drone with your naked eyes  at all times. Not through binoculars. Not through your phone screen. Not through a telescope strapped to Vanilla’s pop-top.