Sony noise-canceling earphones designed for Walkman. I received these from someone, so I don't have detailed information. My knowledge is limited to what I've seen online. I don't know if they work, so they are being sold as junk. Please refrain from purchasing if you are concerned. Only those who understand this should purchase. These are junk items. Please be aware that they may be broken. They are not sold separately. Shipping will be via postal mail. Please understand. #Sony #NoiseCanceling #Walkman #JunkItem #Earphones #HeiseiRetro #Antique #Vintage