Thank you for visiting. This is a gray SONY MDR-EX450 wired earphone. Originally, the metal part of the earphones had the SONY logo printed on it, but the paint has peeled off due to aging. The model number is printed on the earphone cable, and I have included a photo of it, so please check it. I think it's a good match for music with heavy bass and low frequencies. Personally, it was a perfect match with R&B. Of course, I think the overall sound range it covers is quite deep and wide. Operation confirmed. The sound can be heard without any problems. Only those who understand that this is a used item, please. Sony SONY MDR-EX450 SONY earphone mdr-ex450 Discontinued product Wired earphones