This is the same durable headset as our model SMB-25 but with volume control on the cord so students can listen at their own comfortable level. / Avid SMB-25VC Headset - Stereo - Black - Mini-phone - Wired - Over-the-head - Binaural - Circumaural - Yes / Stereo - Black - Mini-phone - Wired - Over-the-head - Binaural - Circumaural - Yes