Middle School Physical Electromagnetic Experiment Box Teacher Edition (Magnetic Adsorption) All the experimental components are equipped with strong magnets at the bottom, which can be tied attached to the blackboard, not only the traditional physical laboratory components, but also the older models. Big, adsorbed on the blackboard, the teacher can explain the board while reading, the whole class can clearly observe the whole experimental process, greatly improving the teaching effect.Outstanding features of the new product:Metal parts such as switches are made of pure copper, which not only has better experimental results, but also is more upscale.A variety of wires can be used for the binding posts, and the teaching experiment link circuit is faster, saving valuable teaching time and improving teaching efficiency.The meter is bigger and more intuitive, with four rare earth magnets on the back, which can be tied attached to the blackboard.Packed in a more solid aluminum case for easy collection and transportation