The $299 YI 4K+ ups the resolution and feature capabilities of its predecessor, the 4K Action Camera. 4K+ Action Camera, capable of capturing 4K video at 60 frames per second, which is double that of GoPro's Hero5 Black. It's not only a first for YI, it's a first for the category. It's also the also the first camera to use an Ambarella H2 SoC processor, offering a maximum bit rate of 120Mbps, which does make for some sharp, detailed video (and huge file sizes).
While you can buy a waterproof housing and other mounts for YI's cameras, the 4K+ has a tripod mount. Also, YI says the new camera will work in the 4K Action Camera's housing, so there's no need to get a new one.
Due in part to the Ambarella H2 SoC processor YI used, the camera is full of shooting capabilities. For me, the most important is electronic image stabilization at a resolution of 4K at 30fps -- something no other camera in the category can claim.