Because of size, features and luxuriousness, digital blackboards range in price from the very reasonable to high-end interactive displays: noisy is common with all of these categories.Adding an array of technological features to the traditional chalkboard, these new devices replace old methods of learning and make teaching a pleasantly tiring job.Main functions of a digital blackboard: give play to the vividness of real-time annotation, and let the whole display become a multimedia platform all at your command.Wireless communication has become an essential part of digital blackboards as technology always endows these devices with new functions, such as touch-screen capabilities, high-definition resolution and compatibility for a variety of educational software. 　thanks to the rigorously tested systems of controls and checks built in over timeIn these schools, training courses, conference rooms: Information is no longer received but becomes a collaborative process.(dllexport: console)