Do you want a creative scientific experimental tool? This hand crank generator will be your . Suitable for students DIY scientific experiments. It is excellent to develop their practical ability and thinking ability. Features -Color: Blue -Material: Plastic, , metal -Size: 13.50X10.00X4.00cm/5.31X3.93X1.57in -No-load output voltage: 6.3V -Output : 0.2A -High strength, good toughness, not easy to break, they are suitable for students' physics teaching. -The outer casing is made of plastic, which can intuitively understand the principle structure of gear transmission. -The hand crank generator is a great students and to learn physic science. -Simply turn the handle and then the electricity generated makes the bulb light. Great for classroom physics teaching demonstrations. -With it, by building science experiments, improving their hands-on ability, thinking ability, creativity. Package list: 1 x hand generator