I purchased this a few years ago and used it a few times before storing it. The resolution is very high, and both the low and high frequencies are emphasized, with a wide soundstage, giving the impression that the earphones have been upgraded several levels. However, if the earphones originally have emphasized low and high frequencies, the emphasis may feel excessive, so I stored them. The onso cable is tangle-resistant, and the 04 terminal parts are made of titanium, giving an overall impression of good quality and durability. There are no noticeable scratches or stains, and I don't feel there are any problems with use, but there is no packaging bag. Please purchase only if you understand and agree that this is a used item.