1.Type:Electric circuit experiment kit 2.Power:AA Battery (Please note battery are not included) 3.Size:14.5cm*8.4cm*3.4cm (Plastic package box size) 4.Mainly used in electrical experiments in primary and middle schools. 5.The product is essential electrical consumables for primary school science, middle school physics laboratory and students' home laboratory. 6.This help your kids to learn the electric circuit function properly.Understand how electric flows through a circuit. 7.It Can excite children's curiosity and promote imagination, developing intelligence, exercising the ability of using hands and brain. 8.Parents and children to assemble it together to improve parent-child relationship. 9.It's useful for keeping track of unproductive habits, like play phone and online game for a long time. Package includes: 1x switch 2x battery holders 2x bulb holders 5x 12 cm long wires 5x bulbs NOTICE:Plastic box packing(No battery)