It is electric experimental equipment for students, which is made of for and in use. This professional teaching equipment for physics teaching can train the student's practical ability and their interest in learning. A good teaching aid to help teachers explain relevant physical knowledge in class. Features - -blue - Material: Plastic, iron. - Size: 10.50X7.50X3.00cm/4.13X2.95X1.18inch. - Constructed by using high-grade material, ensures it safety and can use it with confidence. - Promote the student's understanding of basic electrics knowledge and their learning effect. - Easy enough for junior students and kids to explore in advance and get interested in physics science. - Portable design and compact size, easy to carry and store. It will meet your needs! - A good teaching aid to help teachers explain relevant physical knowledge in class. Package list: 2 x Electric Bells