Your headphones connect to your mobile device using Bluetooth 4.1 and sport 40mm drivers, which deliver a frequency response from 20 Hz to 20 kHz with 32 Ohms of impedance. Active noise cancellation filters out external sounds for a more immersive experience. Music controls and a microphone are located on one earcup for convenient control over your calls and music, and the included fabric-covered cable with angled plug has a one-button remote of its own. The E65BTNC can seamlessly switch between connected devices and lasts for up to 15 hours with Bluetooth and noise canceling or up to 30 hours with ANC and a wired connection. The comfort-fit headband, covered in soft-touch fabric, lets you listen in comfort all day long, and the fold-flat design enables easy storage.