The Casio Pro Model Projectors have increased I/O connectivity, are DLP 3D Ready & have auto brightness adjustment to save power & reduce eye fatigue. They are interactive Whiteboard ready (USB models only.) By using the optional Interactive Pen with any white surface, whether whiteboard, screen or wall. Use the Interactive Pen as a PC mouse to scroll & click through software applications or as a pen to draw, write & annotate images. They also include RJ-45 wired LAN, wireless presentations & Mobi Show, WLAN presentations from smart phones & mobile devices & presentations from your thumb drive.