Looking for a fun, easy science experiment? This circuit model can satisfy your needs, and great addition to a classroom lesson plan. When conducting these experiments, stimulate curiosity and intelligence. Features - ColorLight Green - Material: Plastic, iron - Size: 10.50X7.50X3.00cm/4.13X2.95X1.18in - Winding: 150 turns - Operating voltage: 4.5V - Working current: 1-2A - The material is safe and light, which is wear resistance and practical for the lasting time use. - By completing the tiny circuit science experiment project with your child, let your child experience the science. - Used in electrical experiments in primary and middle schools or home DIY circuit test, arouse students' interest. - Develop your child's imagination and hands-on ability, this science toy makes your child more interested in scientific experiments. - Make your kids keep from computer game and cellphone, and play this interesting experiment. Package list: 4 x Electrical Bell Experiment Model