Excellent sound fidelity for a small, compact portable handcrank radio. A few turns will give you time to listen to the AM/FM Radio or use it to light an area or to charge other small digital devices or cell phones that do not have automatic shut off from variable power. Product size: About 5.3 x 2.5 x 1.5" (134 x 42 x 67mm) Voltage Output 5.6 V Max.output power 2.5 W