Our Morpheus 360® SYNERGY ANC Active Noise Cancelling Wireless Headphones were designed with the aptX™ Sound Codec, that supports a truly wire-free listening experience, with robust connectivity when making calls and listening to music, an easier pairing experience and longer battery life. Our Headphones work up to 40 hours on a singe charge and work in Wired mode with the included cable even when they run out of power. We engineered our SYNERGY Bluetooth Headphones with USB Type-C fast charging and a specialized battery that charges twice as fast. In the rare case that your Wireless Headphones run out of power, a 15 minute quick charge will provide up to 5 hours of use. They also work in wired mode with the included cable...and include a hardshell carrying case for traveling.