【NOTE】Make sure to connect 4K devices (such as a TV stick) via HDMI to play the video. Tip: Videos labelled as 4K will be displayed at the original resolution of 1080P. 【Native 1080P, 4K Supported, 600 ANSI Brightness】With native 1080P resolution, 600 ANSI brightness, 20000:1 high dynamic contrast ratio, 4k projector is at least 95% brighter and clearer than other 1080P projectors.