Chest strap: Epic pictures from the ego perspective are thus easier than ever. - Comfortable and safe. - Adjustable, slip-proof design so you can focus on the ACTION.Toggle between horizontal or vertical image. - The rotating mount base allows you to switch between horizontal and vertical shots as desired.1. The chest strap is compatible with different Insta360 action cams that weigh up to 250 g.2. Depending on the size and shape of your camera, you can use the included holder extension as needed.3. If you are using a camera with a standard 1/4-inch thread (such as the ONE X2), you should use the supplied 1/4-inch fixing adapter.4. Please follow the instructions above when installing. Do not use the chest strap with other accessories.5. Let it dry in the air after use and store it in a cool, dry and well ventilated place. - This text is machine translated.