Featuring the first ever wireless NXTGen ActiveNoise Cancelling technology for in-ear headphones, JBL Everest Elite 100 combines the immersive experience ofactivenoise-cancelling with the ability to control the amount of outside noise to let in, giving you the power to balance awareness of your surroundings with your listening experience, all with the simple press of a button. With bluetooth 4.0 for wireless connectivity, an ergonomic earpiece for unprecedented fit and comfort, and a 6-hour rechargable battery, this is the ultimate feature package in an on-the-go design. A built-in microphone allows for easy call access.