The Yoogeer Adjustable Cellphone Selfie Chest Mount Harness Strap is a versatile and comfortable accessory for action photography and videography. Designed to fit a wide range of cellphone models, including iPhone 14, 13, 12, 11 Pro Max, Xs, Xr, X Max, Samsung Galaxy S21+, S21, S20+, S20, Note 20, 10, HTC One M7, M8, M9, and more, this chest strap mount can accommodate devices with a width between 55-85 mm. The elastic adjustable chest strap design ensures a secure and comfortable fit for widely use. The mount is also compatible with GoPro Hero 1, 2, 3, 3+, 4, 5, 6, 7, 8, 9, SJCAM SJ4000, and other action cameras. The package includes a chest strap mount, phone clip mount, adapter, long screw, making it a perfect accessory for skiing, mountain biking, motocross, paddle sports, or any activity where you want to get a view of the action. The product dimensions are not specified, but it is made of rubber material, and it is a H-Shape" or "X-Shape chest mount.