As a basic starter accessories kit for Yi II/ 4K action camera/Yi Lite, it covers your most your needs when you are doing outdoor sports. Waterproof Housing case: Specially designed for Yi 4K action camera/Yi Lite, made of high transparent material to ensure the clear photo shooting, submersible up to 131 feet/ 40m under water, ideal for diving, snorkeling, surfing, wakeboarding and other water sport activities. With this case you can connect your YI action cam to other accessories ONLY using a screw. Chest harness mount allows you to use your camera on chest to record those before you. It's fully adjustable to fit a wide range of adult sizes. Head strap mount makes it easy to capture immersive video and photo footage from your head; can be used on head or helmet, not recommended for high-impact activities.