I've tried a lot of headphone sets. Plantronics are my favorite. It is a very good quality product. This was a exact replacement purchase for a headphone set witch I ruined by entangling the cord in a swinging door. The M175C seems to be the best corded unit available.

Not as decribed M175C the M if for moble phone it did not fot it, the C if for Cell phone it did not fot it, I beleave this is not a true pantonics product.

This head set was a big disappointment. It does not fit into my ear properly. The person you are talking to you can hear just fine but I can hardly hear them. The volume increased on the phone does not make any difference. Either way I use it, I can't hear. It falls off your ear also.