DESC: This versatile, high-performance electronic whiteboard features a large-format image area with durable, anti-glare steel-backed projection surfaces for both electronic sensing-based and dry-erase writing. Using a combination of ultrasound and infrared technologies for stylus position sensing and cursor hovering not only eliminates the possibility of spurious or accidental "contact" signals during your presentations, but also ensures high-speed, accurate stylus tracking over the entire image area.