I have just acquired this unit used from someone and I have some questions. It only came with a car plug an external antenna and a dashboard mount. The questions I have are where can I find the serial number, how can I update the databases when they expire, what cords and such would I need to update when the databases expire, and what other things would you suggest I get for this gps? I will be using it in a rental plane that has a gps much worse than this and I don't know if I will use it for driving or not yet.
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