With the Dynamo or Solar Radio Flashlight you will never have to worry about dead batteries during a power outage again. The Dynamo or Solar Radio Flashlight can be powered by several different methods, by turning a fold-a-away hand crank or use the power of the sun to generate power. This radio comes with 2- 3 volt Ni-Cad rechargeable batteries built in. To make it even more versatile you can use 2 regular AA batteries (not included) or an AC to DC 12 volt adapter (not included). This radio performs thee (3) separate functions •flashlight, radio (with headphone jack), siren-and is ideal for both indoor and outdoor use. Included with the radio you will received 1 replacement bulb in the built in replacement bulb holder, 1 yellow lens (for signaling), and 1 red lens (for signaling). The flashlight will allow you to see clearly outdoors at night or during a power outage. In an emergency, the siren and flashing light can be used to summon help. The AM/FM radio with built-in speaker and telescopic antenna provides great reception for listening to your favorite music or to official broadcasts during an emergency Dimensions are L 9" x H 6" x W 2 3/4".