This listing is for a Magellan Explorist 500 GPS unit, with the upgraded 5.2.70 firmware..  There are two batteries that come with this unit as well.
The unit is in VERY good condition, and the FOUR NEW ADDITIONAL SCREENS make this unit much more useful than units with only the original four screens.   
Please see the pictures to view them..
The information fields are all customizable to only include the data that is most important to you, and two of my personal favorites are "VMG", and "Direction" (which is the delta between your course Bearing and your course Heading)..
This comes with the North American basemap, but if you would prefer the EU basemap instead, let me know and I can install that version for you..
Please let me know if you have any questions or want additional pictures..
This listing is for the bare GPS unit (plus two batteries) only..
If you need the USB transfer cable and/or the 110v power adapter, please let me know and I'll create a listing for you that include those as well..