Zen Logic ZL-BBGR Green Stereo Bluetooth Boom Box with 10 Watt Power & Passive Woofers, 3,600 mAh Battery & USB Smartphone Charging. High definition, maximum bass Bluetooth speaker with wireless range of up to 33 feet. Black and Purple highlights. Features auto device pairing and 10 hours of play time from one charge, also includes hansdsfree speakerphone function. Also functions as backup powerbank to charge other mobile devices. Includes rechargeable Li-ion battery and charging cable.