Active, battery-powered loudspeaker; Dual 4″ woofers & two 1″ tweeters; 200W max power; LED woofer ring & center light show; LED strobe lights; Dustproof & waterproof (IP67); Designed to float with woofers & tweeters out of the water; Linkable to another Altec(R) Xpedition with Bluetooth(R) pairing;