Usage Occasions -- The Pellking phone chest mount is suitable for skiing, fishing, biking, and motorcycle riding. It allows hands-free video recording. We do not recommend using it for shooting video during jumping or running activities. For better video quality, turn on the anti-shake function of your phone. Great Choice for POV/VLOG -- The phone can be positioned horizontally or vertically. The J-Hook design with a long screw enables 90-degree rotation. The strap size is easily adjustable and fits over thick winter jackets and a wide range of body sizes. Stable Structure -- The phone holder features non-slip rubber pads at the top and bottom. Use the included mini wrench to securely tighten the long screw into the J-hook mount. Once adjusted, the phone clip stays firmly in place at the desired angle, ensuring stable and shake-free recording. Quick Release -- The smartphone chest strap mount with J-Hook allows for quick and easy installation and removal. The mount can be disassembled in seconds, offering convenience and flexibility.