Usage Occasions -- The Pellking phone chest mount suits for skiing,fishing,biking,motorcycle,Hands-Free for commentary on the video.we aren't suggest use it shooting video when jumping and running,When you turn on the anti-shake function of your phone, the effect of shooting video 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,fit over even the largest winter jackets,fit to wide range body size.Stable Structure -- There are two non-slip rubber pads at the bottom and top of the phone holder;When you use the mini wrench provided to fasten 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 smart phone chest strap mount with J-HOOK can be easily install and remove your phone,which can be disassembled in even one second. It is very convenient.