A:AnswerI had a spare 256gb micro SD card that I'm using. Seems to work fine after formatting. This GPS has 16gb of internal storage from the factory so you might not need an SD card.
A:AnswerYes, the antenna must be present for traffic. it is a simple power cable otherwise. Any reputable radio installation shop should be able to splice into and extend length of cable.
A:AnswerNo, this model comes pre-programmed with street mapping and is not compatible with any type of TOPO or off-road maps. You may want to check out the Garmin Tread® Series, our new rugged, all-terrain navigators with on- and off-road navigation.
A:AnswerIt comes with a USB 3.0 cord that works with your computer for original map installs, then they can be updated via Bluetooth. This is the same cord you use in your vehicle with the supplied cigarette to USB adapter. They recommend that you use the adapter. I don't think there would be any problem if the vehicle USB voltage is the same as the adapter voltage. The adapter has some other advantages with like a !/4 plug you can use to connect your vehicle stereo if you can't use Bluetooth. There is another USB port to charge your phone.
