Hand Crank Driven Electricity Generator Mechanical Emergency Power Education Kits Hand Crank Generator Hand Generator Pedal Generator Science Kit 3V~6V industrial_Dec2022 prevent dust and debris from

prevent dust and debris from entering the port when it is not in use

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Hand Crank Driven Electricity Generator Mechanical Emergency Power Education Kits Hand Crank Generator Hand Generator Pedal Generator Science Kit 3V~6V industrial_Dec2022 prevent dust and debris fromHand Crank Driven Electricity Generator Mechanical Emergency Power Education Kits Hand Crank Generator Hand Generator Pedal Generator Science Kit 3V~6V Product Features This hand crank electricity generator could help kids to understand generation of electricity, quite suitable for adult and children to play together Slowly rotate the crank one circle each second and the voltage could reach 3V that could easily lighten a LED This set comes with one