I have used this product for 10 days, until it is maintenent perfait. This is beacoup smaller than I imagined and quality of sound is amazing for this size. I bought it to listen to music deu USB key (and Micro SD) and the cube responds perfectly to my expectations. There is also a radio function and like the other desent, he catches only 2-3 stations but that's ok for me. The seller responded quickly to my questions and I find that it is very professional and even friendly.