This is a fine and verry simple to work GPS system, and i work every day from the day it kame out 3 mar 2007 and tested it with tomtom 7. the results where even better. It got even a nice stereo sound. al the Technical Details are jus like Anubis writes.just one minus, you cant instal other software, but that is no problem, it works fine as it is. I was a tomtom guy, but that is in the far past. this system is its money worth.