... 4.LCD, TV All In One Multimedia MachineLCD Touch Monitor, embedded with advanced infrared touch technology, large digital full ... HD display technology.Built in single /double writing , multi touch Monitor ;Built In PC, support free ... ParameterPanel size: 55 inchResolution: 1920(H)*1080(V) (Full HD)Aspect ratio: 16:9Contrast Ration: 5000:1Brightness:>=550cd/m2Viewing ...