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Characteristics: Magical handheld generator Electricity can be generated without batteries It 's very suitable for classroom physics teaching demonstration. Just turn the handle, the electricity generated makes the light bulb Bright. The faster the handle turns, the greater the power generated. Made of transparent plastic shells, students can see the motor clearly, gears and wires. This grip handle generator can be connected to electrical Circuit. Screw out the miniature light bulb, almost usable Any experiments requiring up to 6.3 volts of dc electricity. The scientific toolkit is well suited to demonstrate energy from mechanical to electronic conversion.