Description In-ear headphones deliver rich, robust sound via JBL Pure Bass technology. Bluetooth connectivity lets you pair the headphones with your smartphone, tablet or MP3 player. Comfort-fit earbuds feature an ergonomic shape and a soft feel for exceptional comfort. Provides 6 hours of battery life and recharges in as little as 2 hours. Battery life will vary depending on the product configuration, product model, applications loaded on the product, power management setting of the product, and the product features used by the customer. As with all batteries, the maximum capacity of this battery will decrease with time and usage. They are lightly used but still work great. I've absolutely loved them. I just happened to get a newer pair of headphones.