Ermenegildo Zegna, in collaboration with Master & Dynamic, over-ear Bluetooth® wireless headphones and stand help you to tune into your work while tuning out ambient noiseuntethered. Forged aluminum body with pelle tessuta leather, stainless steel components, and neodymium drivers. Exposed all-aluminum machined antenna offers best-in-class signal range while contributing to distinctive design. Bluetooth® 4.1 with Aptx high-quality audio. May also be worn "wired"includes detachable 1.25m (49") Standard Cable. Headphone connection: 3.5mm Passive Audio input micro USB for charging/firmware updates. 16-hour rechargeable battery. Soft lamb leather-wrapped ear pads with detachable memory foam. Omnidirectional, noise-isolating microphone for clarity. Passive audio available when wireless disabled. Also includes: canvas headphone pouch, canvas cord case, and leather cable box. Dimensions: Approx. 7.8" x 7.3" x 2" (200x185x50mm) Drivers: 45mm (1.8") Neodymium Frequency response: 5-25,000Hz Impedance: 32 Ω Weight: Approx. 12.2 oz. (345g). Imported.