Avantree HM100 Motorcycle Bluetooth Headset Kit.
I have used this combination for over two weeks and found it very easy to use.
It was simple to pair with my phone and the audio was perfect when using the Co-Pilot App.
However playing music lacked bass which is not a huge problem for me.
Volume is very good too, you need it quite high when traveling at 60/70mph due to the wind noise.
Battery life I feel is pretty good, it lasted for over six hours of constant use and still didn't run out of juice. (I have not ran the battery right down as I prefer to charge everything back up when I'm home. So I cannot give an accurate time frame for battery life)
Bluetooth range is good too, works over 15m (through metal lined walls) which for me even with a pillion is perfect, you shouldn't need that range otherwise you have lost something/someone.
Overall I am very happy with the HM100 it does what is required at a low price.