Audio Tech's wireless in-ear headphones feature Bluetooth 5.0 technology to pair powerful, high-fidelity sound with the convenience and freedom of a truly wireless design. Auto power on/off, means the headphones turn on and are ready to go as soon as you remove them from the included charging case. Return them to the case and they power off and begin charging. The headphones offer 15 hours of continuous music playback on a full charge, with 30 hours of additional power available from the charging case, so you can take your music with you wherever you go. Plus, the case is equipped with a USB-C battery jack, allowing you to recharge the case quickly when you need to do so.