The unit is supplied with an instruction manual in English. The manual is well structured and quite extensive, as I would prefer a manual in German, although I usually have no problems with English manuals. In particular, the signature of the manual should be a little bigger.
The cable and the keypad act well finished, the flexible cable of metal is pliable and holds in the chosen setting. The total length including plug and control unit is sufficient to 26cm. The AUX cable to a length of 30 cm, which is also sufficient. The cigarette plug offers with the additional USB port and a port for SD cards have an extension.
The Pair with a Bluetooth enabled smartphone works without problem for the radio mode, the frequency needs to be coupled. The status display is shown by an LED.
The operation is complicated at the beginning a little bit, but after a short time is set the operation and the many possibilities no longer present problems.
The quality of the speakerphone is good, though a bit more volume would be better. The voice quality is sufficient. There were no disconnections or any other abnormality.
Conclusion: Little helper of a lot more takes out from the car radio and the smartphone, thus succeeded, albeit still with a few weaknesses.