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emf shielding anti radiation 5G blocking beanie hat for daily use
emf shielding hat
emf shielding beanie
anti radiation hat
anti radiation beanie
5G blocking hat
shielding range:10MHZ-3GHZ
Attenuation:55-65DB
| size | average size, free size |
| color | black,grey, beige |
| attenuation | 50DB at20GHZ |
Washing Care:
Machine washable with cold water(below 30 centi-degree)
Do not iron
No bleaching
No chemical dry-cleaning
Silver fiber refers to a composite fiber formed by infiltrating nano-silver ions into nylon fiber. It uses i to generate an induced current according to the loop formed by the Riau silver fiber, and the induced current generates a reverse electromagnetic field for shielding. Silver has a good conductor that can reflect electromagnetic waves, that is, when the aperture of the metal mesh is less than 1/4 of the wavelength of the electromagnetic wave (wavelength = speed of light/frequency), the electromagnetic wave cannot pass through the metal mesh, which plays the role of shielding electromagnetic waves.
