As an alternative, you can use any of the older TomTom GPS available on ebay for about $15 to $25. There are several style handle bar and ball mounts for around $5. The older TomTom units had a Windows file format so they are easy to modify. I have a TomTom One xls (paid $20). I have cloned the latest TomTom Rider operating system and the latest set of North American Maps (USA, Canada, Mexico, including Alaska). It has a mini USB charging port (bought a 12vdc charger cable for $5). I also got the water proof case (again about $5), and they have integrated blue tooth. The whole set cost about $35. I have two (second one was $15), just in case something happens to the first I have a back up. They work fine, and the latest operating system locks onto satellites fast, and with the Rider version you have one touch hot keys, bike specific routes (twistes), trip stats, and return same route option.