The JBL SYNCHROS S500 delivers a balanced audio experience that maintains clarity regardless of volume, and delivers deep, powerful bass. The patented LiveStage signal processing technology enhances sound performance for a more realistic listening experience. For AAA batteries, you can play 20 hours of LiveStage technology, sound quality and impeccable music. Available in glacier white and agate black, and compatible with iOS and other smart phones. Powerful new design, made of the highest quality materials With the addition of revolutionary patented technology, every detail of the S500 is a model for leading the trend. 
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911 Signal Technology Inc. , http://www.911signaleurope.com