Designed for use without batteries or power cords, the Dynamo radio gets all the juice it needs from exposure to the sun or hand-powered cranking. The piece is a great choice for emergencies or power outages, but it can also serve as a daily device for folks who like to tune in while outdoors or take their station with them as they move about the house. Plus, its engineering is easier on the environment. A compact little unit, the Dynamo features a dial tuner, a simple on/off slider switch, and a collapsible antenna. Finished with an attractive green housing, it receives both AM and FM signals and measures approximately 3 by 2-1/4 by 3-1/4 inches.