RF radiation caused by router. Modem/Wifi Cover provides over 60dB shielding! Shielding frequency range of 10MHz to 3GHz and still over 99.6 % effectiveness at 5.6GH z.
^^ Material: copper material with breathable radiation protection fabric that allows a natural air flow for cooling. Just tuck around the entire modem/router for the greatest amount of reduction of radiation, or if you want more radiation/stronger signal to leak through, you may only partially place onto the router antennas. Adjust it as you wish. Not advised to wash. ^^ Features and Functions-Router and wireless radiation blocking up to 99%, block yellow dust and fine dust to protect router. It can protect your head from electromagnetic waves and sleep better.
^^ SIZE: 13.7 x 15.7 inch. Customized is accepted. If you need customized please tell us. You can also buy the fabric from us and make it yourself which is much cheaper.
^^ REFUND: This Shielding Cover is proved to reduce EMF and RF radiation. If you are not completely satisfied with your purchase, just return it to us within 30 days for a full money-back refund. And any questions please tell us.