Active noise canceling technology that continuously pinpoints and measures ambient noise in order to block out the things you don’t want to hear. Now you can focus on what matters most - the music. Up to 30 hours of wireless playtime with active noise cancelling and 45 hours without noise cancelling. Frequency Response is 20 Hz – 20 kHz Collapsible design and compact size makes the ultimate travel companion Multi-directional control knob - play, pause and shuffle your music, Adjust volume and control phone functionality Travel Kit - USB-C charging cable, 3. 5mm cord and carry bag to stow it all away Driver impedance: 32 ω