Short Throw and Pro (USB models only) projectors are interactive whiteboard ready, using an optional Interactive Pen with any white surface, whether whiteboard, screen or wall. Use the Interactive Pen as a PC mouse to scroll and click through software applications or as a pen to draw, write and annotate images. You can touch the screen as you would with a marker or use it from a distance, even with screens so large that you can’t reach the entire surface. Choose a Casio Short Throw projector to minimize shadows, whether it is wall or ceiling mounted or on an AV cart. No special software needed. No calibration required.