Sennheiser HD 660s Audiophile Headphones (B-Stock) - Discontinued bluetooth Type Circum-aural closed-back headphones Impedance

Type  Circum-aural closed-back headphones Impedance 35 Ohms Sensitivity 101dB SPL / 1mW @ 1 kHz THD 0

Portable case

44 oz) Power System 5V/1A or 5V/2A Qi certified charger Battery GO pod 180mAh

Standard equipment on all series of the following headphones: RS1

Sennheiser HD 660s Audiophile Headphones (B-Stock) - Discontinued bluetooth Type Circum-aural closed-back headphones ImpedanceHD 660S The perfect blend of power and control. The powerhouse open back headphone Connects you to the deepest corners of your music collection. Hi fidelity sound Open back design 42mm transducers Luxurious comfort Detachable cable A Direct Connection To Your Music Known for their engaging signatures and liquid smooth response, HD 660S predecessors HD 650 and HD 600 shattered performance barriers in the audiophile headphone category. The HD 660S