The title as well as this brief video (at the advertisement web site web link) states it all:
http://www.todayshomeowner.com/video/sprinklers/
I have two (2) offered. They are brand-new and still in the boxes. Mfg 'd by Naan, version 525-007 referred to as the "undercover irrigator".
Asking $15 each or 2 for $25.