Zenhon Full Color HD Multimedia LED 1000 Lumens LCD Home Cinema Theater Portable Projector International Version - Product may not include US Warranty Projection Size: 49-130 inches; Support Keystone Correction, easy changing in 16:9 and 4:3 aspect ratio; Projector is not the SHORT THROW PROJECTOR, it only can adjust the size of image by change the distance. We suggest best Projection Distance: 1.5-2M; best Projection Size: 49-80 inches, which can make you obtain best User Experience. Multi-function Interfaces USB*2/SD/VGA/HDMI/AV/Micro USB, can connect with your PC, laptop, or TV set-top box(STB) to watch TV, or device with USB. Allow a break after 3-4 hours using to avoid overheating. 50W Low Power Cost. USB output is only for power supply. Portable design, easy to take and travel. System Support: Multi-media (Music, Picture, Video, TXT); Native Resolution: 800*480; Contrast: 1000:1 (NEED TO USE IN DARK ENVIRONMENT) Not recommended for PPT or business presentation, ideal for home theater movies and video game use. Enjoying watching movie at home and outside for camping.