Could you guys explain the expected use/operation?
Last time I had tunes in helmet I was using a pair of headphones plugged into a walkman 
So using Sena or something like that you have no wire between helmet and the phone? Or do you need to power your helmet?
and how do you use it? manage it all by the phone? How do you take an incoming call? Make an outgoing call?
What is the best reason to have it? I always ride solo, no need to communicate with anybody around me.
When I'm riding solo, I use the headset to listen to music or radio from my phone via Bluetooth. When my wife and I are riding two-up, we communicate back and forth through the headsets rather than yell into the wind.
When my son is out with us, we can all three be on the same frequency and communicate together. This is handy to let each other know when we need gas, directions, etc.
Ours are rechargable, plug them in when you are not riding, charge them up. Ours last about 2-3 hours, depending on how much use they get (they power down when no one speaks for a period of time, power up when someone speaks).
You can make and receive calls, although I can never hear the caller when I'm riding, but it does beep if someone leaves a message.
We've been happy with ours, obviously with any electronic device, they are subject to malfunction.
