this product be just awful . it take forever to acquire a satellite . once it do , it be initially confuse as to where it be , basically think it be at the last destination it reach . I have faithfully update the firmware every time a new iteration come out and the product do not get any better . in area where there be a lot of street , it get confused and send you in the wrong direction . I would not recommend this product to anyone . I would give it zero star if Amazon have such a rating .