1. The completely wireless earphones deliver up to 40 hours of exceptional JBL Pure Bass sound, while the ergonomic, waterproof design provides all-day comfort in any weather.2. Four microphones eliminate ambient noise and connect calls simply and seamlessly, allowing you to enjoy perfect calls anywhere.3. With active noise cancellation and intelligent ambient technology, you can choose to isolate yourself from the world or interact with your surroundings.4. Closed-back design ensures all-day wearing comfort. Even better, the JBL Headphones App lets you customize your entire listening experience.5. Connect to the world your way. Fully wireless earphones with 230NC noise cancelling technology. Fully wireless earphones with 230NC noise cancelling technology.