Eton Rukus Solar
We've been fans of Eton's sun-powered speakers in the past, but unfortunately direct sunlight equals quick overheating messages from most devices. The Eton Rukus Solar ($150) takes care of this problem by acquiring its audio over Bluetooth, letting you store your device safely in the shade — or in your pocket. Other features include an easy-to-grip handle, an E Ink display, the ability to run off AC or solar power, dual 2.25-inch speakers, and an aux-in jack. Sunlight not included.