Garmin GPSMAP 76 Versatile Navigator With WAAS. I have to say that I know nothing about how this works but it does appear to be working. The unit measures 2 3/4" X 6" and it comes with it's original box, manual and cord. PLEASE NOTE...POSTAL SERVICE DELIVERY TIMES MAY BE LONGER THAN EXPECTED. Please email me with any questions and be sure to check out my other auctions this week and in the future. Thanks for looking and good luck!