beyerdynamic MMX-300 2. Generation – Thomann United States
beyerdynamic MMX 100 Black Gaming Headset - Walmart.com
beyerdynamic MMX-100 Black – Thomann United States
Beyerdynamic MMX 100 gaming headset review | PC Gamer
Amazon.com: beyerdynamic MMX 100 Closed-Back Over-Ear Gaming Headset with META Voice Microphone and Excellent Sound for All Gaming Devices : Video Games
User manual Beyerdynamic MMX 300 (English - 9 pages)