... /LED Touch TV 2.TV,PC,whiteboard,projector integrated 3.assistant for teaching,meeting,training 4 ... move, rotate, zoom in/out object and shift page, etc. with your finger instead of e-pen ... and earphone can be built in;The operating page can be stretched;Abundant teaching resources -- the ... protractor, set square, searchlight and other tools, and to page up/down, drag object, clone object, etc. Also, ...