Unbelievable sound: 12W of pure audio power with enhanced bass Thunders from dual neodymium drivers. An advanced digital signal processor ensures pounding bass and zero distortion at any volume. Intense bass: exclusive bass up technology and a patented spiral bass port boost low-end frequencies to make the beats hit even harder. Outdoor-proof: IPX7 protection safeguards against rain, dust, snow, and spills. Get incredible sound at home, in the yard, or anywhere else imaginable. 24H Non-Stop Music: Anker’s world-renowned power management technology and a 5,200mAh Li-ion battery deliver a full day of sublime sound. Grab, go, Listen: classic design that has been refined and lightened, with effortlessly simple controls.