Mostly I use the receiver as a Bluetooth receiver from my Android smartphone. The Bluetooth connection will automatically be restored. The sound is great.
The smartphone controls from conflict, such as when a navigation announcement into bursts in an audio book; Depending on your audio app is audio playback
* Pause and resume a little set back again (Smart Audio Books), or
* Leisegedimmt (Poweramp)
It's very comfortable.
The supplied microphone I have not installed, because I (with suppression of ambient noise) for suitable holding the microphone of my smartphone. (The corresponding Bluetooth protocol I have been deactivated.)
About Bluetooth reproduced audio can be conveniently controlled via the receiver:
* Pause / Play
* Next / Previous Title
* Volume
* Display of meta tags (mp3)
The installation of the receiver is easy, especially due to the low mounting depth.
The apps offered by JVC I find annoying waste of time, that can not hold a candle to the above apps.