Let me tell you that is a POS. Way over priced, only 30 day warrenty. Oh, and one other thing, it will break, ask me how I know. Worst add on I ever spent money on.
I too have one (p/n 63004-09) and it has worked just fine for me, so far. I bought mine new, about a week after I bought my '07 Ultra and kept it after the accident, then put it in the new bike. Works fine.
There are so many mixed reviews on this! The normal gauge for the fairing is your best option. It's a little more trouble and money...but well worth effort and expense.
This thread can get interesting with all the answers you'll get...grab a bowl of popcorn and a beer and sit and watch all the mixed reviews!