DemerBox (~$300) harks back to the days of the true boom box with its carrying handle and lunch box-esque form factor. Yet, technology and ruggedness set the Demerbox far apart from its D sized battery toting predecessors. The portable bluetooth speaker is built off a rugged pelican case platform and packs a rechargeable Lithium Ion battery that can deliver up to a whopping 90 hours of playback and usb port to charge your devices. Inside the box there is room to spare as all of the components and electronics are designed into the lid. That means you can still keep and handful of goodies inside secure and dry. Durability is the DemerBox's best asset as it is waterproof, freeze proof, and shock proof for wherever your wanderings end up taking you.