Utilising Bluetooth 4.0, the JBL Everest Elite 150NC facilitates wireless listening pleasure. The lightweight in-ear headphones feature adaptive noise-cancelling technology, which users can adjust according to their preferences so as to, for instance, perceive ambient sound during workouts or listen to music undisturbed while on the way. With their flexible neckband, the earphones are easily folded up and stowed away. The equipment includes a two-way microphone so that phone calls can also be made with noise- and echo-cancelling technology.