Includes a pull-out slide viewer, eliminating the need for a large screen. Also has a zoom lens, which adapts to any projecting situation. Then there's the remote (wired) and also the large capacity (140) slide trays.
To be fair, I've used it only once so far, but it appears to be in perfect working order. My old broken projector is a different model, and I was surprised by the slide viewer on this model, a very handy feature.