Yi 4K camera is half the price and matches or beats the Go Pro Hero4 Black on a spec for spec basis

The Yi4K Action Camera is almost exactly a GoPro Hero4 Black. It has similar features. The Hero4 Black costs $500, and the Yi 4K costs $250.

The Yi 4K beats the Go Pro Hero4 Black on a spec for spec basis It has twice the battery life and a built in touchscreen