If you just bought the new 2016 Xiaomi Yi 2 4K Sport Action Camera you are going to new a cse to protect it from water and damage. This is the cheapest case I have found yet that has good reviews.
Specs of Waterproof Case for Xiaomi Yi 2 4K Camera:
Great to use the camera 45m underwater, ideal for scuba diving, snorkeling, swimming, and other water sport activities
Full body waterproof protect your camera from water, perfect fits for you Xiaomi Yi 2 4K Sport Action Camera
High Strength PVC Material, 45M Underwater Waterproof, Dust proof, Shockproof
High quality high transmission tempered glass lens, AF, AR dual coating, easy to clean and scratch proof
Built with standard quick release mount, long screw, easy to attach other accessories
Find the USA version of the Yi 2 4k Action Camera Here Now!
Find the Waterproof Case here Now!