What can I say!! Super processing, aluminum with a matt metallic finish and rich sound, the Ferrari among the mini-speakers !!! That is probably the secret of Bose remain as they got out of this tiny speaker such a bass out. The tweeter in this unit are clear !!! The coupling is easy, simply turn on the speakers and turn on Bluetooth on your phone and connect to the speaker (all without the hassle of codes) and off you go !!! One thing is clear, with this part you can specify at any cookout or in any pool !! Just buy it, it's worth it because it puts all comparable speaker in the shade !!