Bought for my DJI Mavic mini. To be honest I haven't seen them in action since I crashed the Mini just before I got them and upgraded them to a drone with sensors. BUT, I was impressed when I received them. They fit perfectly on my mini with a clip that wraps around my arms and stays in place (can't just clip them anywhere like a rebel). They are pressure operated, so you have to screw the cap on tighter to turn them on or unscrew them to turn them off. They didn't interfere with my drone's folding arms. The only problem is that when you try to put the drone in the special case, it presses on the cover and the light turns on while you press on it. But as soon as the drone fits into the case, the pressure is released and the light goes out again. I recommend them for visibility. This is clearly not what is required for a solo night flight. But it's easier to see your drone from the ground.