The Trey is a multifunction chair that has a detachable base, so it basically transforms from a desk chair into a rocker with an extra surface for use as a foot stool, desk, side table, or anything else you can think of. It costs $299 and actually seems like a great chair for use in dorms or apartments. Although back when I was in college we didn't use chairs. We used saw dust. And we walked uphill both ways in ten feet of snow to get to school. Yeah, it was pretty tough back then.