Very good Bluetooth speaker for the price

I want to share my experience on this Bluetooth speaker here.
My expectations were not particularly high, at the price of 15.99, but I was more than surprised by the quality of this small speaker.
I also still have a bit more expensive portable speaker, but which does not have Bluetooth.
I have compared the two still together.
The speaker of Poweradd builds on a good and stable Bluetooth connection, only if you turn the volume to stop and you look further away from the speaker gets to small errors in the transmission. However, to me the full volume is anyway a bit too loud, so I had no problems with the connection.
Even the battery is better than imagined. Suspected I had a duration of about 30 minutes-1 hour.
In my use of about 2/3 to 3/4 volume, however he holds about 4 hours. This value is in my opinion more than adequate.
This little box can also play music via a Micro SD card and this worked flawlessly. I tested this. With a 8 GB, 16 GB, 32 GB and 64 GB card Normal SD Card worked with me to 32 GB and when he did not recognize 64 GB card, although the normal Micro SD card, SDHC card, however.
Now for the most important: the sound!
What comes out of this small cube get out, you do not expect. It is quite small, however, and distortion free is pretty loud.
The sound is not quite comparable to my other speakers, but that would be for the price also unfair.
For my subjective impression of the loudspeakers in the central region is really good, although levels are not bad, but you can tell anyway, that the speaker is more tuned to the midrange. Even low sounds come across well for the size of this unit.

All in all I can recommend this little box all who are looking for small money a really good portable speaker with many features such as Bluetooth and playing Micro SD cards.