Features: Adjustable, suitable for 46-70cm/18.11-27.55 inch Head circumference, good elasticity, comfortable to wear. Non-slip silicone particles inside, effectively increase the friction between the Head and the headband, prevent from dropping. Universal 1/4 screw buckle design, suitable for most cameras on the market. Front and rear dual cameras positions, release a wider viewing angle. Multi-scene and wide use: can be used for sports, cycling, skateboarding, running, vlog recording and more. Specifications: Material: PC Plastic, High Elastic Band Suitable Head Circumference: 46-70cm/18.11-27.55 inch Max Load bearing: about 250g Applicable Models: for 360 ONE RS/R/X2/X/GO 2, also suitable for 10/9 action cameras Package Includes: 1x Camera Head Strap 1x Co-directional Extension Adapter 1x 1/4 Screw Adapter 1x 1/4 Screw Rod note: Please allow 1-2cm errors due to manual measurement, make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.