1、Multifunction: This case uses "black" plastic and "black" metal cover plate, the whole machine eco protection material. Support physical booth, comparative explanation, PPT, desktop, video, scanning management, PIP and other seven functions, for teachers to choose to use. 2、Round Edge Design of the Whole Machine: This machine in the appearance design, round edge treatment is used around, installed in the classroom, students chase after class, can prevent injury safety accidents. 3、Magnetic Opening and Closing Door: The door bracket adopts magnetic and damping opening closing, non pneumatic bar linkage, to prevent the bracket from opening and falling, to protect the safety of teachers and students. 4、Focusing Method More Suitable for Teaching: Adopts automatic focus free mode to avoid repeated focusing due to paper movement or shadow change in the display process, and improve the efficiency of teaching demonstration. 5、Detachable Module Design: The shooting rod of the lens can be separated from the box, and the operator or teacher only needs to loosen the screw through a simple cross screwdriver, and the shooting rod can be easily returned for repair or inspection.