1---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. 2---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. 3---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. 4---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. 5---What will you get: Package included:1 x Phone chest strap mount,1*S adpater,2 x J-hook,2*Long screw,1*Universal phone holder,1*Lanyard,1*Mini Wrench; Any quality issue please contact us directly,we'll give you a replacement or a refund,you can buy it with confident. Cautions: Not suitable for high intensity exercise. Weight: 250g