[Occasions for Use]-- The phone chest mount is suitable for skiing, fishing, cycling, motorcycling, and hands-free commentary for videos. We do not recommend using it for filming videos while jumping and running. Turning on your phone's "anti-shake" function will improve video filming results. [Great for POV/VLOG]-- The phone can be placed horizontally and vertically. The J-hook and long screw design allows the phone to rotate 90°. The strap size is easily adjustable, fitting even over the largest winter jackets, and accommodates a wide range of body sizes. [Stable Structure]-- There are two non-slip rubber pads at the bottom and top of the phone holder. When using the included mini wrench to secure the long screw to the J-hook mount, the mobile phone clip will remain in your adjusted angle for stable shooting without slipping. [Quick Release]-- The smartphone chest strap mount with a J-HOOK allows for easy installation and removal of your phone, which can be detached in just one second. It's very convenient.