The House of Marley Bag of Rhythm Portable Audio System Portability - The included protective canvas carry bag looks great and makes it easy to take your music wherever you need it. Compatibility - Charges iPods and iPhones when docked. Aux input connects hundreds of other devices with included cable. Marley Sound - 4.5-Inch high-output woofers, 1-Inch high-definition tweeters and a powerful amplifier provide deep bass and an enhanced listening experience. Power System - Intelligent power system can use a 100-240 VAC universal wall adaptor or 6 D-Cell batteries and optional rechargeable lithium ion battery available. Designed and built with FSC certified Birch wood and durable canvas.