The Light Up Logo TruWireless Earbuds and UL Powerbank are 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 2hrs to charge the earbuds from 0 to 100%. When the front of the powerbank is decorated via Laser a LED light will appear, making your logo light-up! Bluetooth working range is 10 meters (33 feet). Bluetooth version 4.2. This item must be lasered to reveal the light up function.