. I would like to know if anyone can tell me the intensity of the magnetic field of this item
About 500 Gauss or 0.05 Tesla.
You must remember our entire lives are spent in a magnetic field produced by the Earth's molten core.
Generally speaking, magnetic fields create forces that push on moving charges.The human body has plenty of moving charges inside it.
The moving charges are the different atoms that make up the molecules of the human body,
Or I should say the electrons orbiting a positively charged nucleus of an atom.
The electric attraction between the electron & the nucleus pulls the electron inward, while the rules of quantum mechanics prevent the electron from collapsing down completely onto the nucleus.The relevant “rule of quantum mechanics” my "avatar" is the Heisenberg uncertainty principle, which says that if you confine an electron to a volume of size r, then the electron’s momentum has to be at least as large as the corresponding kinetic energy is.
The smaller or more tightly you try to confine the electron the more kinetic energy it gets. But if the magnetic field is strong enough it can distort the orbit of the electrons around the nucleus enough to sufficiently change their shape, then the atoms chemistry would change dramatically & these atoms that make up the molecules would start to fall apart.
I could be wrong but I think the strongest static magnetic fields we can create artificially are only about 100 Tesla, & as pointed out correctly,
it is perfectly safe to get an MRI scan,
during the scan you are exposed to several Tesla's.