Technical Parameters: Item No./Model PH4 Pixel Composition: 1R1G1B Pixel Pitch(mm) 4 Pixel Density(dots/m2) 62500 Brightness(cd/m2) 1800 Viewing Distance(m) ¡Ý4 View Angle H:150¡ã,V:150¡ã Gray Scale(level) 1024 Display Card DVI card Control Mode Synchronous Drive Mode Static constant current Refresh Rage Rate(HZ) 420 Working Temperature(¡æ) -25-- +85¡æ(for working) Working Humidity 10%-95%RH Model Size(mm) 128*128 Cabinet Size(mm): 768*512 Cabinet Dimension(m2) 0.393 Cabinet Weight(KG) 28 Cabinet Resolution(dots) 192*128 Cabinet Material Steel/Aluminum Lifespan 100,000 hours. Wooden case.