The sound from KOLAY is really very good. Got him compared to Music Angel and the sound of KOLAY convinced me most. He is smart, well made and makes with its 225 grams a high impression. However, movements of Amazon was as always speedy, so I can only recommend the KOLAY. One last tip: on YouTube there is a video of me with a direct sound comparison of the two mentioned devices ("MUSIC ANGEL vs. KOLAY").