I had 2 vega v-tune helmets. I'm sure this is close to the same quality. I think u be better off to get a Scala rider g4 or g9 and put it into your existing helmet or a new quality helmet. Some friends just got a pair of g9 scala riders for around $300, if you can find someone to go in with its 150 ea and a great unit.
I'm running a g4 in a Schuberth S2 helmet, with Siri on my iPhone I can do everything while riding by voice commands.
Edit ... Just checked they paid $390 for the G9 2 pack