-La caja protectora. Very high quality and warm slippers. I am a short person, so I was fearing it would be too big for me, but turns out the fitting was perfect. bass very pronounces as can be expected with in ear headphones. Ciò non fa cadere assolutamente lauricolare che resta ben saldo allinterno dellorecchio (almeno nel mio caso), ma è giusto segnalarlo. This bluebooth earbud is very easy to use. You cannot screw these in, end of story, they would not screw in. GIGANTIC. My experience is also not good with Amazon. No need to cover yourself in it to make it last all day.