Connection type: Wireless Purchased on Amazon. Bought about 4 years ago and used as one of several pairs of earphones. It has a used feel since it's been a while since I bought it. Connection, noise canceling, and ambient sound mode all work without any problems, so you can still use it. I lost the left earphone, so it's just the main unit and the right ear. I will disinfect it carefully with an alcohol wipe before shipping.