Sorry it took me so long to respond, i overlooked it and if it weren't for a friend i wouldn't have even known. Anyway, i could tell you about it but the website probably does a better job. If you have questions about it after viewing the site, let me know and i will be more than happy to answer them for you. So far, it's a great piece, although i've only used it once.
http://www.findmespot.com/
Craig