Hand Crank Driven Electricity Generator Mechanical Emergency Power Education Kits Hand Crank Generator Hand Generator Pedal Generator Science Kit 3V~6V bee Bottom Contour Display: The weeds

Bottom Contour Display: The weeds and rocks at the bottom of the water can be displayed on the fish finder handheld which helps you better understand the bottom contour underwater

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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 bee Bottom Contour Display: The weedsHand 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