Sennheiser Momentum M2 AEBT Wireless Over-Ear Headphones Black, NOB ————- Contents: Come with accessories in retail box. New Opened Box Condition. ———— The new Sennheiser MOMENTUM Wireless lets you experience crystal-clear MOMENTUM Noise Gard hybrid active noise cancellation blocks ambient noise using 4 microphones for ultimate isolation to dramatically improve sound quality in noisy environments. Connectivity Technology: Wireless22 hour battery life with both Bluetooth and Noise Gard activated to ensure performance during long commutes or plan