smart document camera 280 power supply. Among them, comprehensiveness means that not only specific data should be collected in the basic data layer, but also all activities in the school should be recorded in all directions; dynamic means that the collected content contains procedural information and can be to a certain extent. The original appearance of the restoration event or activity; the persistence refers to the real-time monitoring of the progress of various activities in the school, and the intermittent activity is also regularly collected according to its cycle. Key technologies such as the Internet of Things, big data, cloud computing and ubiquitous networks can assist in the collection and calculation of the above data and build a high-quality basic database.. Interactive Document Camera is a completely new concept design and mobile visualizer. The touch capability on IQTouch and IQBoard, IQView E3511 Document Camera can be freely used for presentations anywhere in or out of the classroom or office.