Great choice for POV/VLOG. The phone can be placed horizontally and vertically. The J-hook and long screw design allows the phone to rotate 90°. The size of this strap is easily adjustable, even fits the largest winter jackets, and accommodates a wide range of body sizes. Quick Release: The smartphone chest strap mount with J-hook is easy to install and remove your phone, which can be detached in just one second. It's very convenient. 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 fasten the long screw to the J-hook mount, the mobile phone clip will align with your adjusted angle, ensuring stable shooting and preventing slippage. Multi-Use: Suitable for mountain biking, skiing, snowboarding, motocross, paddle sports, cliff diving, wakeboarding, and other action sports. Not intended for running or high-intensity activities.