Very well working emergency flashlight. Keep in mind that this light is to warn other planes about your gifts and you may not see the light during flight. It is mounted on your drone. I was able to test my ability to see light myself at about 1400 feet in an area I know well. You can see the light well in civil twilight, and even better at night. I can't test the required 3 mile view range myself, but I was really impressed with the ease of use and mounting options. It comes with Velcro and elastic straps that can be used to securely attach to the drone. Great device, easy to use, great price. See my profile for more reviews. Many Thanks.
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