Features: Seamlessly for action4/3/2/1 cameras enthusiasts. Ideal for outdoor adventurers, cyclists, skiers, and content creators needing handsfree footage with body mounted camera stability during high motion activities. Capturing stable biking trail, ski descents, or hiking adventures using the sweat resistant chest strap or vibrations dampening starp mount. 5Option set with different assceesoies as Head Chest foldable Strap Mount,Screw Bolt and others The Head and Chest Straps are craft from elastic nylon,which can be adjusted to suitable size for adults or kids;makes your camera recording first person views easily; Specifications: Component: ABS Color: Black Size:Approx.13x20x6cm/5.11x7.87x2.36inch for action4/3/2/1 Camera; Option Type:1set/3pcs,1set/4pcs,1set/5pcs,1set/7pcs,1set/9pcs, 1set/3pcs Includes: Chest Strap Mount+J-Hook Buckle+Screw Bolt; 1set/4pcs Includes:Head Strap Mount+Phone Clip+Elastic Band+Screw Bolt; 1set/5pcs Includes:Chest Strap Mount+J-Hook Buckle+Screw Bolt+Phone Clip+Two Claw Adapter; 1set/6pcs Includes:Chest Strap Mount+Head Strap Mount+2Screw Bolt+J-Hook Buckle+Phone Clip; 1set/9pcs Includes:Chest Strap Mount+Head Strap Mount+2Screw Bolt+2Phone Clip+J-Hook Buckle+Two Claw Adapter; Package Includes: Package A 1set/3pcs Chest Strap Mount Package B 1set/4pcs Chest Strap Mount Package C 1set/5pcs Chest Strap Mount Package D 1set/6pcs Chest Strap Mount Package E 1set/9pcs Chest Strap Mount note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.