Feature: EXPERIENCE POV : More stable when POV videos of high-intensity sports and effective against shake EASY TO WEAR VEST-STYLE DES : Easy to wear, as easy as wearing a vest. QUICK RELEASE: Centered button clasp design, single button, easy to operate FLEXIBLE TO ADJUST: The straps are made of elasticated cord with four adjustment buckles to suit different body types, even in winter. EASY AND CONVENIENT QUICK RELEASE BASE: Features for Hero base with a rounded J-clip for quick viewing of HELP YOU : Compatible with for Hero, for Action and more other sport cameras. For camera and smartphones it requires extra 1/4 adapter and phone holder. DETACHABLE SHOULDER STRAP: Remove the straps and wash them separately, Keeps it as clean as new CO-ROTATING EXT TENSION: Increases camera mounting flexibility THICK ERMAIN PANEL: Increases the strength of the product and extends its life Material: PC+ABS colour: black Package Contents: 1 x chest strap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.