This hand crank generator is very easy and simple to operate, which can for student physics electricity experiment. It is simple and small, excellent and reliable, carefully crafted. The hand crank generator is suitable and wonderful for school, classroom, home use. Features -Color: As shown -Material:Plastic, , metal -Size: 8.00X7.50X6.00cm/3.14X2.95X2.36in -Voltage: 0-3V -Current: 0-1A -This hand crank generator is more secure and more stable, and it can work in high performance. -This science crank generator is perfect for demonstrating the energy transformed from mechanical to electrical. -This educational science toy also makes kids on the fun of exploration and discovery. -This hand crank generator is a great educational toy, children can use for physical experiment, which enhances the ' and patience. -A great and practical children to enjoy and learn, suitable for primary and middle school students. Package list: 1 x hand crank generator