This 'cheap bluetooth' option sounds to me like a lot of trouble just to save 300 bucks for Sena20
I have a job and a credit card. I walked up to a Cyclegear store, had a Sena 20 installed on my helmet right there in the store. I walked to my bike and paired it with my cell...I am good to go.
it went on the credit card, I didn't even feel it.
A giant star blew up, elements combined, a long time passed and then, there you are. The mother of all mothers, even yours, is a supernova.