Sony Lithium CR2032 3V CMOS Single Battery

Immerse yourself in your world. Whether you’re tuned into music or taking calls, you’ve got no cords to hold you back. Dual Connect lets you use either earbud, or both, anytime you want, in stereo or mono mode. Your favorite artists sound incredible with JBL Pure Bass. With up to 21 hours of battery life and a comfortable fit, you can keep the fun going all day and night. And if you miss the world, you can take and end calls or talk to your voice assistant using just a finger. Simple as that!