Thank you for viewing. This is a SONY in-ear, sealed-type wired earphone compatible with smartphones. I used it a few times after purchasing it, but it didn't quite suit me, so I stored it away unused. Upon listing it, I checked to make sure it was working, and it sounded great without any distortion! After checking, I also cleaned it simply with alcohol, so you can use it right away if you purchase it!! I will pack it in bubble wrap and ship it! #SONY #Sony #Earphones #SealedType