[Wide Application] Freeing your hands, great for outdoor sports, extreme sports, and underwater photography, like cycling, running, climbing, diving, and more, providing first person view camera angle. [Adjustable Chest Strap] Made from premium polyester material, padded, elastic and breathable, suitable for a wide range of body types; quick release buckle design, easy and comfortable for wearing. [Rotatable Phone Clip and Silicone Mat] Adjustable length from 5.3/ 2.0inch to 10cm/ 3.9inch, support horizontal and vertical photography; with silicone mat for fixing the phone more firmly, preventing accidental falling off. [Lightweight Design] Adding more comfort while not affecting it's performance, nice replacement for GoPro Hero10/9/8/7/6/5/4, Session, 3 #43;/3/2/1, Fusion, DJI OSMO, etc. Specifications #xff1a; Color: Black Material: Plastic and polyester Phone Clip Width: 5.3-10cm/ 2.0 * 3.9inch Silicone Mat Size: 11.4 * 5.8cm/ 4.4 * 2.2inch Chest Strap: 36 * 34cm/ 14.1 * 13.1inch Chest Strap Weight: 123g/ 4.3oz Note #xff1a; The sports cameras and smartphones showed in the pictures are not included. Package List #xff1a; 1 * Chest Strap 1 * J-Hook 1 * Thumbscrew 1 * Adapter Screw 1 * Phone Clip 1 * Silicone Mat