... dynamic digital sketchpad 3.simulation experiment 4.green material,marker 5.aluminume 8 years e@Board Interactive whiteboard is ... 4).Green Material:Aluminum Honeycomb panel, aluminum frame ,support marker pen writing and erase, anti-flare, keep good project effect ... finger or any other opaque objects,no need special pen Resolution8196*8196Cursor Speed200 s/second,quick responseCurrent Consumption< ...