Amazon.com: Sennheiser HMD 280 PRO - Professional...
https://www.amazon.com/Sennheiser-HMD-280-PRO-Communication/dp/B001FWGQZU
Sennheiser HMD 300 PRO Broadcast Headset with Ultra-Linear Dual Sided Response & Dynamic Based on the closed-back, dynamic HD 280 Pro headphones, the HMD 280 PRO headset has been...
SENNHEISER HMD 280 PRO INSTRUCTIONS FOR... | ManualsLib
https://www.manualslib.com/manual/795382/Sennheiser-Hmd-280-Pro.html
View and Download Sennheiser HMD 280 PRO instructions for use manual online. Also See for HMD 280 PRO. Technical data - 1 page Instructions for use manual - 39 pages.