The MH40 Wireless Over-Ear Headphones are the latest evolution of our very first headphones. Featuring our first custom titanium drivers and up to 30 hours of playtime, the newest generation of MH40 stays true to our signature headphones' timeless design with an aluminum body, lambskin leather details, and lightweight and durable coated canvas. Master & Dynamic® MH40 Wireless Over-Ear Premium Leather Headphones - Silver Metal/Navy