About This

• The small ball is a tungsten bulb made of glass, metal, and insulating materials.
• Tips:The positive and negative poles must not be directly connected, otherwise it may cause a short circuit.
• It can be used as a flashlight light source and indicator light of a distribution box.
• Mainly used for electrical experiments in primary and secondary schools.
• The package includes: 10 * 1.5V bulb. 1 * Battery box. 1 * Switch button. 2 * Wires. 2 * Lamp holder.