[Occasions for Use]-- Phone chest mount for skiing, snowboarding, cycling, motorcycling, hands-free for video commentary. we do not suggest using it to film when jumping and running. When you turn on the "anti-shake" function of your phone, the filming effect will be better. [Great Choice for POV/VLOG]-- The phone can be placed horizontally and vertically, the design of J-hook and long screw can make the phone rotate 90°, the size of this strap is easily adjustable, fits even under the largest winter jackets, fits 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 you use the included mini wrench to attach the long screw to the J-hook mount, the mobile phone clip will be in accordance with your adjusted angle, stable shooting, will not slide. [Quick Release]-- The smartphone chest strap mount with J-HOOK can easily install and remove your phone, which can be disassembled in just one second. It is very convenient.