Pretty good flash for drones. I can't confirm (or deny) the 3 mile claim as I've never flown that far. It's very bright. What I particularly like is the size and weight. Super small and light. I compared it to the Fire Station Arc 5 and the Fire Station Arc. I consider them as reference flashes for comparison. You can see in the video comparison that this little guy was close but not as smart as the other two. However, it is smaller and lighter than all others. (picture with velcro). I like using a flash on the back of my MA2, which requires careful positioning to avoid interfering with the vision sensors. This one is quite narrower, making it easier to use without causing this problem. It has white, red and green options, each color has 3 display options. White is obviously the brightest (has 3 LEDs), but other single color LEDs are still quite bright. It's a good deal, especially for the price. Highly recommended!