Yes it will work. You can either buy the map on a microSD card from a Garmim dealer or direct from Garmin in which case the map will be locked to the card's serial number [CID or Card Identification number] and can be used in any compatible device. You can also purchase a download version from Garmin in which case it will be locked to your device's UID [Unit Identification number], it may then be placed on it's internal memory if there's sufficient space or on a microSD but still will be locked to the UID in that case. You can also buy it as a DVD in which case you load it to your computer and can select only certain parts of EU to send to the unit/card. Look at the 'Requirements' tab here:
Something worth thinking about is that you can buy a cheap nuvi in UK or EU when you get there for maybe the same or not a lot more than the cost of only the map. The map's cost may vary depending on the country where you order it from and therefore might be more that the 100 bucks the US site shows when you buy it in Asia.
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