... standard dry erase markers found in every office supply store.♦Collaborate and host whiteboard sessions with remote users ... software installation)One USB2.0port.Applicability:Writing surface: normal whiteboard, blackboard, rear projection, flat wall, plasma screen, ... 20 inch; Max: 120 inch. ( diagonal)Surface compatibleNormal whiteboard, Blackboard, LED Screen, Plasma, Rear Projection and even ...