These speakers give a surprising result ... Sure you will not hear deep bass (otherwise you have to opt for an active system Bass Boost plugged in!) The positive comments on this article are entirely deserved . As for the comments more reserved ... they all have in common criticism: the sound is not good when the speakers are charging. Logic: either the load on USB (under two hours), or we listen (autonomy over ten hours). But not both simultaneously! And yes the cover is small, but I admit I have not bought for the cover ... but for music, and there, the result is there!