The Xoopar® Ring Series Bluetooth earbuds allow you to answer calls and enjoy wireless music up to 30 feet away. They are compatible with most Bluetooth-enabled smartphones, tablets, laptops and desktop computers. The control buttons allow you to adjust the volume and manage your calls and music, and the 21" flat wire inhibits tangling. The Bluetooth earbuds come with a micro USB charging cable, three earpiece sizes and a protective zippered case. Earbud recharging time is approximately two hours and will give you 4-5 hours of playback time. Standby time is up to 160 hours. This product has been thoroughly tested and is FCCID, EPL, MSDS, UN38.3, CA65, 7P compliant.