Basically, thats what it looks like
This one is for an S5. Racing Beat units usually sell for $115 or so. It is a must have on any turbo car running higher than stock PSI (8psi or so on S5).
The only downside is that it does make the factory boost gauge read incorrectly, but lets face it, if you have modified your 7, at this point - you're not paying attention to the stock boost gauge anyway...