Twins dual battery Bluetooth® earbuds. Are you tired of the short playback time of your Bluetooth® earbuds? These dual battery Bluetooth® earbuds give you over eight hours of playback time on a single charge! The earbuds bring pristine sound to your ears whether you’re on-the-go or sitting in the office. With the built-in microphone you can make calls and the music controls allow you to change the song with the touch of a button. The earbuds design sits perfectly into the bowl of your ear. The Bluetooth® working range is 10 meters. Includes micro USB charging cable. ABS plastic.