WB4600 is an input device, based on computer, and featured with people and computer interaction mode. It includes ultrasonic whiteboard and related software. Ultrasonic whiteboard can test position information written by electronic pen, and transfer this information to computer connected, this place information is integrated with screen picture in computer, it projects to whiteboard via projector, so, a full interactive demonstration is in your eyes .Users can effect a real face to face communication via this whiteboard, can write all kinds of information, such as mark, explanation, picture, modification, sound etc to your electronic document, also can directly arrange your files, pictures, videos, etc, it makes your work life more vivid.