Feature

●This is a scientific experimentation material that complies with the 5th year physiology of elementary school "current and electromagnet"
●Of course you can learn about basic experiments, and the bell ring makes learning fun
●This battery box can easily be used to compare electromagnetic strength with ease
●Enameled wire coil frame for 50 coils per way and finished 200 coils
●For free research in summer and winter vacations


Description

Uses 2 D batteries *Batteries are not included.
★Please use manganese batteries (if the circuit is shortened by mistake, the conductors and hardware may generate heat and cause burns or fire).
The coil frame is long enough to be rolled up 50 times per way.
A battery box that can be easily wired with one touch hardware.
A practical personal bell with good tones.
Contents:
Battery box
·Candles:
·Crown (diaphragm)
Plastic core
·Ramp Stopper
Magnetic needle
Coil 200 times
Iron core.
Nail set
Buttons
Switch stand
Switch hardware
Bell stand
Enamel wire (with frame)
Contact adjustment screw
Stopper
Battery hardware
Vinyl conductor 3.3 ft (1 m)
Coil frame
U-shaped metal fittings.
Sandpaper