The TRUE WIRELESS SoundExtreme SEB 26" has all the features of the original. Now with Long-lasting Lithium-Ion battery pack. Easy install, no longer need to connect to the 12v battery source. The Powersports sound bar and LED lighting system is perfect for your 4WD, ATV/UTV, boat, and golf cart. 100% waterproof, dustproof, and dirtproof. 500 watts of power to 8 marine grade speakers provide a great listening experience. With our EcoCast feature connect up to 50 Sound Extremes at a time! Patent Pending.