... move, rotate, zoom in/out object and shift page, etc. with your finger instead of e-pen; ... interactive and efficient;Wireless Bluetooth WIFI, and earphone can be built in;The operating page can be stretched ... protractor, set square, searchlight and other tools, and to page up/down, drag object, clone object, etc. Also, ... .com Multimedia LED touch TV the integration of TV, PC, whiteboard and projector