Yep, Double it & add a bit, that's the Australia tax for you.
The hard wire of the car, is that where the traffic receiver might be hiding, hacked into the dash somewhere?
Can't say for sure if they are able to receive the same frequency range or not.
You could try contacting Garmin Au & asking them, if you go to America or Europe on holliday or for work, would the traffic receiver still function or do you require a different type or subscribtion. That should give you the answer you are looking for.
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