Steer well clear of this product people. We had version 2.whatever it was and it was garbage. It was so difficult to use that my wife struggled to use the gps at all and I gave up entirely and went back to just using maps. Their maps were very inaccurate with rivers and roads just stopping in the middle of nowhere and the claim of five meter contours was complete bullshit. Numerous times we noticed valleys and other large physical features simply didn't exist on their maps. I did notice that the new "improved version" has been revised to 10 meters
It frustrates me that they can still market this when garmins topo australia is so much better. These clowns are years behind the competition with their product. If you can find any one who has used the garmin product and still has any thing good to say about oztopo I would be amazed.