The XJ-S57 projector has a number of interesting, but not necessarily unique features. As such, we'll just mention some of them here:
First, for such a compact projector, having a motorized zoom lens is impressive (and power focus), but more impressive still, is that the lens has a 2:1 zoom ratio, allowing for tons of placement flexibility, far more than most competitors.
There is also a pointer button on the remote, that can bring up several different "pointers" (arrow, hand, etc.) that can be moved around the screen (with the remote's arrow keys) to highlight what you want to point out.
In addition, there is an underline "pointer" that comes in short horizontal line, or full screen width line.