Xiaomi has launched the updated version of the YI Action Camera, the YI 4K Action Camera, which, as you can tell, now records in 4K. The YI 4K has a 12 megapixel Sony IMX377 sensor, that can also shoot stills in native resolution along with 4K video. The lens is a seven element piece with 155 degree viewing angle and f2.8 aperture. The six axis gyroscope enables the electronic image stabilization. On the back is a 2.19-inch touchscreen LCD. Along with 4K at 30fps, the camera can also record in 2.5K at 30fps or 1440p at 60fps. If you want slowmotion, you can either record at...
Source: http://www.gsmarena.com/xiaomi_announces_yi_4k_action_camera-news-18232.php