Ryobi electronic variable speed orbital action jig saw. Standard jigsaws move their blades up and down. Orbital jigsaws power their blades in an elliptical cycle, moving the blade slightly forward on the upstroke and slightly backward on the downstroke.
How to use a jigsaw: https://www.youtube.com/watch?v=hQ018-LwVo4
Jigsaw blades are not included and can be purchased separately.