AM/FM Solar Dynamo Radio w/Flashlight Converts Free Solar Energy for rechargeable lantern, blinking light and AM/FM radio for indoor or outdoor use activity. These units also have a hand generator when solar power is not available, or they can use 2 "AA" batteries. Great for power failures - IT NEVER NEEDS BATTERIES - IT ALWAYS WORKS. Both Units perform the same functions, the C/78F is more compact for tight storage situations.