1. The width is flexible. And you can use the original screw shank. 2. For hero1 hero 2 and hero3, hero 3 . 3. The back is the same.4. Same way for snap open and easy to wear. 5. With head strap mount 6. Head strap mount is with 3 strips of friction glue 7. Belt covers the part between the PC

 1. The width is flexible. And you can use the original screw shank. 2. For hero1 hero 2 and hero3, hero 3 . 3. The back is the same.4. Same way for snap open and easy to wear. 5. With head strap mount 6. Head strap mount is with 3 strips of friction glue 7. Belt covers the part between the PC mount part and the head