1APPLICABLE MODELS: This helmet extension arm is suitable for a wide range of action cameras, including for insta 360 X3 ONE RS GO 2 ONE X2 ONE R ONE X. 2PRACTICAL ACCESSORY: This camera helmet extension arm has an extended length of 100mm, which can help you get a wider field of view for shooting. In addition, you can record your cycling sports images from the first viewpoint, which is very practical. 3STANDARD FIXING BUCKLE: Equipped with universal aluminum alloy bayonet, it is compatible with action cameras with double leaf and triple leaf bayonets as well as accessories, ensuring wide applicability and compatibility. 4STURDY AND DURABLE: Made of aviation grade aluminum alloy and CNC one piece molding process, it is lightweight but sturdy and durable. Attach it to your helmet and hardly feel the weight, suitable for long time shooting, ensuring stability and reliability. 5EXPANDED DEVICES: Comes with 1/4 inch threaded holes, convenient for you to expand the fill light and other devices to meet the fill light needs you need when riding at night. 1 x HelmetExtensionArm