【LIFE-TIME Warranty】 30-Day money back guarantee, LIFE-TIME Warranty and friendly 7 x 15 hours customer service.【DESIGNED FOR】Go Pro Hero 12 Black/11 Black/Hero 10 Black/Hero 9 Black.【Special Materials】Made of special sponge material, it is light, light and not easy to deform. It is easy to install and feels very soft.【Precise Position Punching】The precise hole position is convenient for normal operation, and will not affect the video effect, restoring the most realistic sound effect.【Applicable Scenarios】Recording in any noisy place can filter out unwanted noise, such as outdoor construction sites and sports venues. Especially in windy weather and strenuous exercise.