The MW50+ headphones deliver the high quality, signature sound of Master & Dynamic over a wireless Bluetooth connection. Precision designed from premium materials with high durability, they're built to last. And with interchangeable ear pads you can choose between on-ear and over-ear wearing style to suit your listening environment. Superb Sound Experience Master & Dynamic's signature sound of richness and warmth. 40mm Beryllium high-performance drivers deliver high class audio, with a wide frequency range of 5-30,000 Hz. Read more… Tactile buttons on the ear piece offer easy playback and smart phone call control. Wireless Freedom Bluetooth with aptX technology provides a high quality and stable wireless connection. Premium Construction With a stainless steel and aluminium body, the ear pads are constructed from memory foam wrapped in lambskin, together with a leather headband for comfort. And the MW50+ fold flat for easy transport. Choose On-Ear or Over-Ear Interchangeable ear pads mean you can choose between on-ear and over-ear design to suit. Over-ear for increased sound isolation and focus, or On-ear for rich and detailed sound on the go. Long Battery Life The battery will last for up to 16 hours off a single charge, and, if you should run out of portable power, just plug in with the included audio cable.