Type: PH4 SMD0805; Pixel Pitch (mm): 4mm; Dimensions (W*H): 256mm*128mm; Resolution (W*H): 64*32; Pixel Density: 1024dots/module; Pixel Density 62500 dots/㎡ Brightness ≥1700 cd/m2 Viewing Distance 1- 100 m based on the pixel distance and your screen size. Drive Mode 1/16 scanning Viewing angle H150° V120° Frame Frequency / Refresh Rate >60Hz/s 800 Hz/s Working Humidity 10%-95% Power Supply 220V,380V OR 110V/50Hz,60Hz Continual Running Time >72 Hours Life-span (typical use) 100,000 Hours Average No Failure Time >8,000 Hours Working Temperature '-20 to +50 Celsius degree Grey Scale Recommend 4096 level (software adjustable from 2bit to 16bit) Power consumption Average: 350W/㎡ Max: 1000 W/㎡ Display Colors 64G(under 4096 level gray scale) Control Mode Video frequency Synchronic control Color contrast ratio / temperature 1800: 1 Symmetry of screen brightness ≥ 0.9 (low brightness/high brightness) Surface Flatness screen surface: +/- 1mm, difference between modules: <1mm Signal Interface DVI (S-VIDEO, CVBS, VGA, PAL/NTSC, etc. thru. a video converter) Effective transmitting distance Unshielded Twisted pair net line transmission distance100m, max 130m Multi mode optic fiber transmission distance 500m; Single mode one 10km Display Media Text, Animation, Graphic, Video, etc. system Operating Platform WINDOWS 98, WINDOWS 2000, WINDOWS XP, WIN7 LED display,outdoor LED video display,Indoor LED screen,stadium perimeter LED display,stage LED screen, the most professional manufacturer of LED Display