enclosed my review of the product. A video follows a little later because this Amazon has yet to unlock. I post in the comments but before the link to my YouTube video. Then you can (if you like) ever look at the product. A video says you know, more than just written text.
The speaker is well made. The front consists of a metal mesh and behind it are the two speakers. The rest of the case is rubberized. The two feet below the speaker, thereby preventing a slip.
The coupling with the Smartphone is super easy. Turn on Bluetooth on your phone, then the speaker and looking over the phone for new devices, and then connect.
On the top there are 3 buttons: song forward / back, play / pause / call answer / end and quieter loud /.
On the back there is an aux input. Here, by means of jack to jack cable, for example an MP3 player Connect (Bluetooth is not needed).
You can recharge by connecting to the USB input of your PC or external USB charger.
The nice thing is that a Power Bank was incorporated directly. So you can connect his smartphone to the speaker and recharge.
The range I would specify times with good 10 meters. The volume is quite loud tidy and Klan I also liked. The battery, I would specify times with locker 10 hours of running time.
The speakers can also use as a speakerphone. For me, but rather uninteresting. For that I gave my smartphone.
Only negative point is the announcement of the female voice. eg when turning. This always sounds and you can not turn off or make permanent quieter.
Otherwise, a good product.
Greeting Micha