Sennheiser HD 25 wired headphones for professional monitoring, black. - Brand: Sennheiser - Model Name: HD 25 - Type: Wired headphones - Color: Black - Features: For professional monitoring Used a few times, the left side stopped working, so I'm selling them. There appears to be no problem with the contacts, so it's likely a disconnection and the cable will need to be replaced, please be aware. There are some scratches. Disinfected, with box.