Sennheiser IE 80 The ultimate dynamic earphone from Sennheiser. Flagship model Manufacturer's official page https://www.sennheiser.co.jp/sen.user.Item/id/714.html I have used it with care, but I am selling it to organize my inventory as I have accumulated many earphones. The driver balance is fine, and the bass adjustment switch is working properly. Everything in the photos is included. Please check the photos. There is a dent in the mesh part on the left side, but there is no problem with the sound quality, and there is no rattling. There are dents and scratches on the case. Please refrain from purchasing if you are sensitive to these details.