Bluetooth 4.0 technology enables simple wireless streaming from a variety of Bluetooth-enabled devices. Download the My JBL headphones app for simple control. || Rechargeable lithium-ion polymer battery offers hours of music playback on a full charge. The auto-off feature automatically shuts off the headphones when not in use to Conserves battery life. || Nxtgen active noise canceling technology minimizes ambient noise with the push of a button for immersive sound. || 40mm drivers and trunote auto sound calibration automatically calibrates output for optimal audio performance.