Pair your smartphone with these Jaybird X4 wireless sport headphones and head to the gym or hiking trails in comfort. The thoughtful design works with music or your contact list, letting you take and make calls easily. Equipped with Comply Ultra soft tips and rated IPX7 to resist water and sweat, these Jaybird X4 wireless sport headphones create a comfortable experience with every jog or set. Offers up to 8 hours of use on a charge. 10 minutes of charging provides a full hour of play time. Provides protection from sweat and water, so you can easily wear headphones while working out. Comfortable, versatile design runs over your ears for a secure, sport-specific fit or under for more relaxed situations. High sound quality that's compatible with the Jaybird App to customize sound EQ and save personal settings to the buds. Manage calls, and control and listen to music with the push of a button. Convenient, one-touch access to your phone's Siri or Google Assistant manages calls while running or riding. Allows for fast and easy adjustability.