Grab, Go, Listen: Classic design that has been refined and lightened, with effortlessly simple controls. 24H Non-Stop Music: Anker's world-renowned technology and a 5,200mAh Li-ion battery deliver a full day of sublime sound. Outdoor-Proof: IPX7 protection safeguards against rain, dust, snow, and spills. Get incredible sound at home, in the yard, or anywhere else imaginable. Intense Bass: Exclusive BassUp technology and a patented spiral bass port boost low-end frequencies to make the beats hit even harder. 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.