These earbuds with light-up power bank are the future of Bluetooth earbuds. There is no wire connecting the earbuds making them true wireless earbuds. The carrying case also doubles as a power bank. Once the case is charged it can be used as a portable charger for your earbuds and smartphone. The case features a 2000 mAh battery. With over 3 hours of listening time. It takes 2 hours to charge the earbuds from 0 to 100. When the front of the power bank is decorated via laser engraving a LED light will appear making your logo light-up! Bluetooth working range is 10 meters via Bluetooth version 4.2. Aluminium.