alston m18 full hd 1080p projector 4k 5500 lumens cinema proyector beamer android wifi bluetooth hdmi vga av usb

optical parameters brightness:5500 lumens. scope: 4,000 - 6,500 lumen (peak value) resolution: 1920x1080 full hd contrast ratio: 15,000:1 (dynamic) display technology: lcd led lifetime: 30,000 hours throw ratio: 1.52:1 keystone correction: vertical: +/-15 degree interface projection screen size (inch): 50-300 inch projection distance (m): 1.7 ~ 9.2 meter