The Electronic Bell Model is a scientific experiment-assisted developmental toy. It stimulates student's development through scientific experiments and provides a realistic environment with its electronic bell model. Features - Color: As Shown - Material: Plastic, iron - Size: 10.50X7.50X3.00cm/4.13X2.95X1.18in -Winding: 150 turns - Operating voltage: 4.5V - Working current: 1-2A - Encourages scientific exploration with the DIY Electronic Bell. Foster practical skills and thinking. - The tiny circuit tools can bring much more joy to your kids and they will learn so much in the process of having fun. - This DIY Electronic Bell allows kids to conduct multiple experiments and is great to share with family, friends, or classmates. - Easy to use, not only for home, but also for school, can better attract students, cultivate their active learning towards science. - Parents can accompany their children to assembly this toy together to increase parent-child relationship. Packing list1 x Electrical Bell Experiment Model