With the Dynamo Radio Flashlight you will never have to worry about dead batteries during a power outage. With a few turns of the foldaway crank you will always have power. The Dynamo Radio Flashlight performs three separate functions and is ideal for both indoor and outdoor use. The flashlight will allow you to see clearly outdoors at night or during a power outage. In an emergency, the siren and flashing red LED lights 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. Because you can turn the hand crank to power it, batteries are not required. However, if you prefer to use regular batteries it can also be powered with two AA batteries (not included). Dimensions are L 7 1/4" x H 4 3/4" x W 3"