Three stars because I haven't used it yet. I will update the review if necessary. I'm here to tell you it works with HERO 5. No arm attachment required. Light in motion and gopro couldn't tell if they are compatible but I can. The photo shows a wetsuit for Hero 5 and a normal swimsuit, also bought from Amazon. I'm a little concerned that less than 1/2 inch of the screw actually goes into the body of the flashlight, but that's what everyone looks like on YouTube, so I think it's legal. All I can say about my purchase is that it works. And about this product in general. You don't need filters for your GoPro when using this light. I would get full stars if I actually dived with it. came with my hero 5, the nut at the end has changed and it seems like it can't be removed (like the old mounts could) so i don't use the light with my gopro 3-way nor the mounts can that was included (see pictures).
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