The unit is totally "touch screen" with only a power button. After some selections the unit should reboot and you check to verify unit after rebooting.But this button will also bring up a quick access to the Volume/Brightness menu or the audio output switch to the FM Transmitter/Internal Speaker menu. Pressing and holding on the Trip Computer Speedometer (above) will bring up nine diagnostic pages. Looks like these pages might be interesting, if you were receiving FM Traffic or Bluetooth.I just bought a NUVI 680 NA off ebay with City Navigator north America 2010.40 in it.I was thinking of buying the newer City Navigator North America 2017.20 for it but from what I've been reading through some google searches it sounds like the 680 won't hold the entire map because it only has a 2 gig limit and that map is something like 2.7 gig.
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In Europe, the nüvi 660 comes with full Western European detailed street map coverage. The units have the new Si RF Star III high-sensitivity GPS receiver and contains an internal re-chargeable battery.
Closing the antenna to the stored position turns the GPS receiver OFF and is then small enough to fit into one's shirt pocket.
Expert GPS is GPS map software for your Windows computer, tablet, or laptop.
Expert GPS makes it easy to transfer waypoints, routes, and tracks, as well as GPS, GIS, and CAD data, to and from your Garmin nüvi 680.
The screen brightness is quite adequate for sunlight driving, but the speakers aren't quite as clear as those in the c550. -Yes, internal and rechargeable through the cigarette lighter plug, power module, or USB connection.* Step 1. This unit is more to the ideal size of a portable car navigator.