The high efficiency dynamo system allows one minute of winding to create enough power for 1 LED to last an hour and a half or 3 LEDs to last for 30 minutes.
Winding for 3 minutes will give your cell phone 2-8 minutes of talk time.
Great tool for every home, automobile, RV, boat, office, and school.
Never needs batteries.
Dimensions: 7.5" x 2.3" x 2.3"
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