Just finished the install of my GPS Navigation system for my 7s. This puppy gives me Full screen maps, Rest Area Info, Current Location, Current Real Speed, Estimated Time of Arrival, Logs the trip in miles, Gives me my Average Speed and my Max speed. Also has a compass and Clock. And it's also Back Lit for night Time!!!! It runs on 2 AA batteries and that lasts for about 8 hours. I'll be posting Pics as soon as they get developed! The Unit Costs less than a Slip-On pipe! $245.