app1dxd

I have some more dumb questions. What is the basic difference between the 300 and the 400t it seems like it is just the topo maps that are installed is there any other hardware difference. I would like to buy a 300 or 400t for geocashing but I would also like to use it on my off road motorcycle. I frequently find myself riding around and getting lost. The trails curve all around and it is easy to do. Is there some way to record where you have been so you can find your way home.