US maps

Hi....something I've been wondering....I have TT3 installed on my 4150, which is attached to the car windowscreen with the in built sat nav thing. When going to the US, can I purchase / use, any map data, or do I have to stay with TT products to make it work ? Thanks.

TomTom do map's for the USA,

they come as a single pack on 8 CD's to cover the entire country.

Just install the area you are going to.

Has the same activation sequence as normal tomtom.

went to florida this spring and found it great not to have to worry where things were and probably went a lot further than I would have done with out it.