ExpBowers & Wilkins PX Wireless Over-Ear Headphones @ Amazon

Frequency response - 20-20KHz

ADAPTIVE NOISE CANCELLATION - Perfect sound anywhere - on a plane, in the street or in the office. The best adaptive noise cancelling headphones, customizable to your exact preference.

FEEL MORE OF YOUR MUSIC - Built with the same drive units from our P9 Signature headphones, the PX provides optimized listening performance. We have also subtly angled the drivers to provide a more natural stereo perspective.

PX RESPONDS TO YOU - When you need to pause, lift an ear cup. Put PX down and it goes to sleep. Pick it up to resume playing. Worry less about your headphones and enjoy your music more.

SMART POWER -Battery type -850mAh-Lithium Polymer. Battery life- Upto 22 hours BT/ANC, Upto 29 hours BT/no ANC, Upto 33 hours ANC/wired, Upto 50 hours wired/no ANC. PX is always ready; put it down and it goes into power-saving sleep mode; pick it up and you're good to go. PX is the smartest Bluetooth headphone on the market.

TO GET THE BEST FROM PX, install the latest version of the firmware. This is done via the dedicated Bowers & Wilkins Headphones app, downloadable for free from the AppStore or Google Play Store.

Frequency response - 10Hz to 20kHz and Impedance - 22 ohms (passive)

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