Home Theaters Outdoor Camping Projector Native 4K ResolutionFully Sealed Dustproof Optical EngineSignificant Performance Boosts True 4K Resolution: Unlike the previous models, the U1 has a Physical (Native) Resolution of 3840x2160 (4K). This provides four times the detail of the 1080p F1 model. Superior Brightness: It outputs 800 ANSI Lumens (marketed as 8000 lumens). This is a massive jump from the F1's 350 ANSI lumens, making the image much more vibrant and usable in rooms that aren't perfectly pitch black. Better Software & Streaming: It runs