the air-hole helmet bracket is an adjustable-sized bracket for attaching your camera to your helmet.

After inserting your camera into the middle section with the interconnecting apparatus, you can fix the apparatus by passing it through the holes of the helmet.

compatible with all action cameras.

Product features: · material: High quality plastic · size: Adjustable 10-30cm · brand: Knmaster Package contents: · 1 pc perforated helmet apparatus Compatible with: · compatible with all action cameras.