I agree with the reviewers who commented on the cheap feeling of this unit. You basically get the boom that has a mic on one end and the earphone on the other, plus 5 flimsy, plastic doodads and the cords. The "convertible" feature influenced me to buy this, but it's not very practical. The "over the ear" style pretty much lets the earphone bounce on your ear, distracting and annoying in a phone conference. But what really bugs me about the M175C is the sound from the earphone: it's muffled and tinny, like you'd get from some speaker on a child's toy. If you press the headphone against your head it's better, but that isn't why we buy a headset, is it?