Delivering noise-cancellation performance that sets the bar for the rest of the industry, these neckband-type wireless headphones use a 9-mm dynamic driver and a BA unit to create a hybrid configuration that produces everything from clear, deep bass to sparkling treble. Users can also download the smartphone app to enable Smart Listening by Adaptive Sound Control, a world-beating innovation that detects activity via smartphone acceleration sensor readings and adjusts the noise-cancelling and ambient sound settings automatically. The cables fit nicely into slits on the housing, adding a convenient, elegant touch to the design.