Fulfilled its focntion

Nothing to say, it adapts well to gopros and I find the length of satisfactory strips.
Compatibility with all helmets is really not obvious and in my case, I would have wished it to be a bit deeper (along the axis perpendicular to the axis of the strips). Indeed, movements are usually back and forth from right to left that and I hope its first use, I will not have surprises earthquake video, its shape does not entirely wife headphones.

Go shop with your helmet to test and buy on amazon if cheaper.