This is the latest model of the revolutionary wind-up radio developed by Freeplay. Just rotate the handle to power up the internal spring mechanism that drives the radio - or sit in the sun and let the solar panel do the work.
The spring mechanism provides power for up to 60 minutes depending on the power demand. In direct sunlight the radio will run off the solar panel alone, while as the exposure to sun decreases, the radio will automatically compensate by drawing energy from the wind-up mechanism.
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