Mobile phones the size of a Samsung S3 can be inserted without problems, the adapter can be included with to smaller / thicker phones.
Sizing is somewhat tricky (have liked NEN 3. Arm) but still easily mschbar.
When the size is adjusted once the phone is inserted, pushed together the holder and the smartphone is secure. By pressing a button unlocks the Take & Talk and returns the phone again.
There is a standard charging cable at (Micro-USB) which on all popular phones actually (except those mi apple;)) should fit. The charging performance is very good, that phone is despite full load (several apps incl. Navigation, Wi-Fi and Bluetooth turned on) continues to be charged.
The instructions there on the Internet for example, including Kompatiblitätsliste - because Bluetooth is however standartisiert should work any Bluetooth-enabled smartphone.
In my Huawei G615 there are no problems, although not included in the list and after switching on the ignition are mobile and car virtually connected to each other immediately.
Up to this point everything is quite easy and clear.
Criticism is the manual and also the product description:
In the instructions (on the Internet looking for) is that on a Bluetooth phone connection can be made (toll that fits - I did not want my toaster as dranklemmen).
What Otto Normal User does not recognize the fact that there is indeed still a multimedia standard for Bluetooth devices.
This means that can be beamed on the car radio without aids from the appstore no mp3's.
I've tried mp3 still nciht, but a Vorrezension speaks of poor sound quality - may be caused by "Phone Standart".
I have a danger zones Warner installed on my mobile phone - this supports "innately" the "Bluetooth phone standard interface" - here come announcements about traffic jams etc loud, clear and complete on the sound system of the car.
My navigation app supports it, unfortunately not (yet), I had to resort to an app that captures the audio signals and redirect to the appropriate playback device - then absent in the Navi announcements partly the beginning of the announcements.
Why only 4 stars?
5 would be perfect
But as I go out of it, that would buy on the basis of Amazon- and manufacturer of one or the other this holder to his MP3 collection to enjoy while driving or to provide sound appealing in the camper the film from the tray, or to the cell phone as a sat nav to use - which do not go here without further ado - I subtract one point.