Dynamo Power: The hand crank generator charges the internal NI-MH Batteries.
Solar Power: You can play this Radio with the direct Sun or charge the NI-MH batteries. With 12 hours in the Sun, you get 6-8 hours playing.
Batteries: 3 AA batteries allow you to play the Radio the old fashioned way.
Electric : With the included adapter, you can play or charge with 110V electricity.
We sold this radio to US and UK army, they all love this model with great passion.
6 hours charging = 72 hours playing.