... smooth writing comprehensive software integrated projector,computer,TV touch interactive screen integrated projector,interactive board,computer,TV 55'' touch ... screen hot productModel IE-5500 Size/Screen area55"/1345(H)mm ×818(H)mm Activedisplay ... );NTSC(M/BG4.43);SECAM(BG/DK)Audio systemD/K,B/G,I,MNVideo signal480i/480p(60HZ), 576i/576p(50HZ), 720P ...