Completely free from wires and easy to use, the JBL Free Truly Wireless in-ear headphones are your flexible companion for calls, music and an active lifestyle. PRODUCT FEATURES Wireless in-ear headphones deliver JBL Signature Sound in an intuitive, yet intelligent package Smart charging case offers up to 20 hrs. of battery backup so the music never stops Comfort Stay Secure Fit ergonomics with multiple ear-tip and gel sleeve sizes for a tailored fit for all day wear and active use Splash-proof, worry-free IPX5 certified design keeps the music playing through sunshine and rain WHAT'S INCLUDED Wireless headphones Charging case Three sets of silicone ear tips Micro USB charging cable PRODUCT DETAILS Rechargeable lithium ion battery Battery life: 4 hrs. (headphones), 20 hrs. (back up power with charging case) Wireless: Bluetooth Manufacturer's 1-year limited warranty Model no. JBLFREEBLKBT