Enjoy music from your smartphone and useful speakerphone

Short motivation to purchase. Since I have no USB jack but only a AUX input have in my Seat Ibiza, I was looking for a Bluetooth adapter Aux. A complete replacement of the original radio was not an option for me because I did not want to change the appearance. Decided I've connects for Kinivo instead the device from Belkin for the car.

For device:
+ Works beautifully with my Nexus 4
+ Pairing is always automatically restored (unlike the Belkin)
+ Buttons for previous or next track are fully supported so I did not touch the smartphone consumption
+ Particularly surprised I'm actually from the built-in speakerphone. Given the price I was not expecting much since but my Gesprächstpartner told me that you understand me very well.
+ The provided USB port is enough juice to my smartphone in AC mode to load, speaks as the normal power supply
+ Over a long press, the Google voice search will be started and can be launched eg calls

Negative I can not tell yet. I would recommend this device so anyone who wants is looking for a way on his smartphone via Aux play music or a convenient handsfree investigated.