With the Endurance DIVE In-Ear Headphones from JBL, you can stream audio from a Bluetooth-compatible mobile device or play audio directly from the built-in MP3 player. A full gigabyte of internal storage will supply hours of built-in audio. The lithium-ion polymer battery provides up to eight hours of playback per two-hour charge and a 10-minute quick charge enables an hour of playback. When paired with a smartphone, the built-in microphone and touch controls let you listen to music or take calls without breaking a sweat.