The ultimate, high-powered portable bluetooth speaker with powerful stereo sound and a power bank all in one package. the portable speaker takes the party everywhere, poolside or in the rain, thanks to the waterproof design, durable fabric and rugged housing. its high-capacity 4,000mah battery provides 20 hours of playtime and can charge your smartphones and tablets via its usb output. a built-in noise and echo-cancelling speakerphone gives you crystal clear calls with the press of a button. wirelessly link multiple jbl connect-enabled speakers to amplify the listening experience. general specifications battery type lithium-ion polymer (22.2wh) music playing time up to 20 hours (varies by volume level and content) rated power 2 x 10w usb charge out 5v / 2a (maximum) support a2dp v1.3, avrcp v1.5, hfp v1.6, hsp v1.2