The Budget Bluetooth® Earbuds and Carabiner come with an internal rechargeable battery that provides up to 2.5 hours of nonstop music at max volume. The earbuds feature a built in music control and mic. The hard plastic case also has a carabineer clip as a bonus. Micro charging cable included. Bluetooth working range is 10 meters (33ft). Charge Time: 1.5 hrs.