1.LCD/LED TV/PC Touch 2.TV,PC,whiteboard,projector combined 3.teaching,meeting,training,business 4.powerful apps software... DIGITAL 55" ... object and shift page, etc. with fingers or touch pen Teaching tools: compasses, ruler, protractor, set square... pictures amplify/move/erase ... for a longer product life;2. The board has shock and vibration resistance function with solid-state, and the operation is ...