The Metal True Wireless Earbuds and Powerbank is the future of Bluetooth earbuds. As you see, there is no wire connecting the earbuds. Making them true wireless earbuds. The carrying case also doubles as a powerbank. Once the case is charged it can be used as a portable charger for your earbuds and smartphone. The case features a 2000mAh battery. With over 3 hours of talk time these earbuds are a must for any traveler. The ergonomic design of the earbuds keep them in place on the go. It takes 1.5hrs to charge the earbuds from 0 to 100%. Bluetooth working range is 10 meters (33 feet). Bluetooth version 4.1