Description [Usage Occasions]-- The phone chest mount is suitable for skiing, fishing, biking, and motorcycle riding, providing hands-free convenience for video commentary. It is not recommended for use during jumping or running activities. For improved video quality, consider enabling the anti-shake function on your phone. [Great Choice for POV/VLOG]-- The phone can be positioned horizontally or vertically. The J-Hook design with a long screw allows 90-degree rotation. The strap size is easily adjustable, fitting over thick winter jackets and accommodating a wide range of body sizes. [Stable Structure]-- Features two non-slip rubber pads at the top and bottom of the phone holder. When secured with the included mini wrench, the long screw fastens firmly into the J-Hook mount, keeping the phone stable at the desired angle without slipping. [Quick Release]-- The smartphone chest strap mount with J-Hook allows for quick and easy installation and removal. The phone can be detached in seconds, offering convenient and efficient operation.