Definitive Technology Symphony 1 Executive Wireless Over-ear Headphone - Wireless Connectivity: Bluetooth - Frequency Response: 8Hz-28kHz - Nominal Impedance: Passive: 32 ohms, 150 ohms - 1 Year Limited Warranty

Manufacturer Warranty: 12 Months Limited Warranty

Manufacturer Contact Info: http://www.definitivetech.com/,

Symphony 1 embodies the precision and purposeful engineering that Definitive Technology is known for, delivering the very best sound quality and noise canceling experience. Featuring over-ear seal, Symphony 1 immediately drowns out surrounding noise so listeners can create their own Zen space and fully immerse themselves in remarkable sound. With wireless Bluetooth® connectivity for an unencumbered listening experience, a striking aesthetic, and 50 mm drivers for the broadest and richest soundstage, Symphony 1 is the ultimate headphone for the most discerning audio aficionados.

Richly detailed, full fidelity deep bass for exhilarating audiophile performance.

Unencumbered listening experience with Bluetooth® wireless technology.

Positive over-ear seal and dual-mode active noise canceling.

Lightweight aluminum and premium materials for exceptional comfort and style.

50 mm driver for full-frequency sound range and broader soundstage. 

Improved all digital playback and maximized accuracy during digital-analog conversion.

Premium, robust protective case with carabeener and silk liner and soft travel pouch included for convenience.

Easily control and adjust volume, play controls, bluetooth on/off, noise cancelling on/off, power on/off.

Works in active and passive mode for fail-proof performance, even on long trips.

Automatically senses and adjusts noise cancelling levels. Outstanding voice reception when using telephone.