Vacuum Bell Jar, Vacuum Demonstration Hood for Physics Teaching, Transparent PVC Sound Physics Jar with Electric Bell and Vacuuming Plate, Science Lab Equipment for Classroom Exper

Item Type: Vacuum Bell JarMaterial: PVCBattery: 2 x AA battery, shipped without batteries. Package List：1 xVacuum Bell Jar1 x Bell1 x Vacuuming Plate

• VACUUM SOUND DEMONSTRATION: Place the electric bell inside this vacuum bell jar and hear a clear ringing sound. As air is pumped out, the sound gradually fades, demonstrating how sound waves require a medium to travel. A perfect tool for teaching physics concepts in classrooms.
• MULTIPLE EXPERIMENTS: This versatile instrument can demonstrate various scientific phenomena including vacuum boiling (watch water boil again when pumped), evaporation icing, vacuum coating, and atmospheric pressure experiments. An all-in-one teaching aid for engaging science lessons.
• PREMIUM TRANSPARENT DESIGN: Made of high-quality PVC material, our vacuum bell jar offers excellent clarity for observing experiments. The transparent hood allows students to clearly see the electric bell and other demonstration objects inside during physics classes.
• EASY TO OPERATE: Designed with simplicity in mind, this physics demonstration equipment features straightforward operation. Teachers can effortlessly conduct experiments while students enjoy hands-on learning experiences that make science fun and memorable.
• PORTABLE SCIENCE KIT: Complete with vacuum bell jar, electric bell, and vacuuming plate, this compact set is lightweight and easy to carry. Perfect for classroom demonstrations, laboratory sessions, or outdoor science activities requiring vacuum experiments.