The sound is excellent in the medium to low volume areas. When it turned up on all it sounds, especially with rock music, something tinny. By and large, but good sound. Above all, it is really noisy, so you understand everything well in a large room. Through the included power supply to batteries can not load, but you can leave his normal calm batteries with mains operation there. Good is also the option to charge via USB MP3 player or other device. So you hit the same 2 birds with one stone. The durability of normal batteries is very long. I had it on holiday with us and have 2 1/2 weeks almost every night heard about 1 hour music. Thus, if the size is more than acceptable.
The only minus point is the supplied power adapter, which does not work in Germany. The socket connector has UK format. I was, however, it does not bother us, since I was traveling in Malaysia and the connector fit there.
In Germany, I take the part anyway with the lake or the park. Since I need no outlet.
For travelers and fresh air lovers a unique buy recommendation.