Sweat Proof Noise Cancelling Earbuds Compatible with JBL Tune 230nc Wireless Bluetooth in Ear 1.Fully wireless headphones deliver up to 40 hours of exceptional JBL Pure Bass sound, while the ergonomic, water-resistant design provides all-day comfort in any weather.2.Connect to calls simply and seamlessly with four microphones that cancel out ambient noise, giving you perfect calls anywhere.3.With active noise cancellation and Smart Ambient technology, you choose whether you want to isolate yourself from the world or engage with your surroundings.4.Closed Stick format ensures comfort throughout the day. Best of all, the JBL Headphones app lets you customize your entire listening experience.5.Stay connected to your world, your way. Fully wireless headphones with 230NC noise cancellation.Stay connected to your world, your way.