It uses a unique silica gel material that is comfortable to wear and can reshape freely, allowing you to take POV footage easily. The mount is compatible with most action cameras on the market.Use scenarios: Get POV shots during fishing, travel etc.(Use caution when participating in certain extreme sports like rock climbing and diving. Ensure that no foreign objects get caught around your neck to avoid the risk of suffocation.) SpecificationsOsmo Action Hanging Neck MountWeight: 143 gDimensions: 253×160×37.82 mm (L×W×H)Osmo Locking ScrewWeight: 20.7 gDimensions: 55.6×23×13.3 mm (L×W×H) What's in the box?Osmo Action Hanging Neck Mount ×1Osmo Locking Screw × 1 CompatibilityOsmo Action 4Osmo Action 3DJI Action 2Osmo Action