SONY Sony Sealed Inner Ear Receiver Canal-type Earphones [Model] MDR-XB70 Gold [Product Description] With a large-capacity machined aluminum housing with excellent vibration damping and a bass booster, it achieves deep bass that you can feel. Type: Sealed Dynamic This is a beautiful product without any major noticeable scratches or stains. It works normally. I am an amateur, but I have cleaned it with alcohol. Please purchase only if you understand that this is a used item. Please be sure to read the profile. Instant purchase is OK.