... Monitor, embedded with advanced infrared touch technology, large digital full HD display technology.Built in single /double writing , multi ... board software, support touch, writing, drawing, spotlight, mask, media play, record, annotation, free use rich gallery , or Internet ... ParameterPanel size: 55 inchResolution: 1920(H)*1080(V) (Full HD)Aspect ratio: 16:9Contrast Ration: 5000:1Brightness:>=550cd/ ...