This is a digital compass by Brunton. I used it very little, but carried it a lot. I has a feature that will follow your track and then follow that track back. It takes x2 CR 2032 batteries, which I don't have. If you are interested I'll send you a pic of it working. $25 + shipping (edit to add price)
(http://i733.photobucket.com/albums/ww336/sugarray40/ddb5cb0c.jpg)
(http://i733.photobucket.com/albums/ww336/sugarray40/2ad14913.jpg)