Zen Logic ZL-EBWPB Extreme Bluetooth Speaker with Bonus Power Bank in Blue. Portable Bluetooth Speaker with high def sound and maximum bass and a wireless range of 33 feet. Features auto device pairing and 4 hours of play time from one charge, also includes hansdsfree speakerphone function. High impact rubberized shell for added durability. Bonus 2600mAh Power Bank included to recharge on the go or for charging other devices. Powered by included rechargeable Li-ion battery and included charging cable.