Earbud design fits snugly into your ear to provide crystal-clear sound. Automatic pairing quickly connects your headphones with your Bluetooth-enabled device. 30' range allows you to listen to music without keeping your phone in your hand. Up to 3 hours of battery life for extended use. 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. Charge your earbuds on-the-go with the charging case. Case holds enough charge to fully power your earbuds twice. Automatically make and receive calls with the built mic