IQView E4521 Interactive 4K Document Camera 10X with Optical Zoom Highlights 4K Cam & 10x Optical Zoom Extra Large Coverage Easy Connectivity for Display Dual Image Output Allow users to output the dual images simultaneously to the display devices. Matrix Switch Integrating matrix switch module, the visualizer makes it easy to switch the images in real time from three input sources such as courseware, physical object demonstration, and more. Extremely Compact Design