The Ring Series Bluetooth earbuds allow you to answer calls and enjoy your music wirelessly up to 30 feet away, and are compatible with most Bluetooth-enabled smartphones, tablets, laptops and desktop computers. Control buttons allow you to adjust the volume and manage your calls and music. The 21" flat wire inhibits tangling. Includes a micro USB charging cable, three earpiece sizes and 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.