Came fully assembled Im use to it now, but it was a learning curve for a day. Im a 7wide and 8regular. I mostly appreciate that these are not clunky appearing. But I moved to an island a few year ago and I really wanted something that would sound a little punchier at the beach. Fit is a little large so I would order your size or one lower. these are not bad". Battery life is good with no hassle charging. I can easily pause my music while run, it?s just one tap. I used 4 of them for a 5-600 pound welding cart.