Eton Rukus Solar Bluetooth Boombox

The Eton Rukus Solar Bluetooth Boombox ($ 230) lets you enjoy your favorite tunes from your smartphone, tablet or laptop all day long. Its 40-inch monocrystal solar panel soaks up rays to quickly recharge its on-board batteries, while its built-in USB port allows you to plug in and charge any device while on the go. [source]