>They make "Faraday Bags" exactly for this purpose. Only "they" do not certify them in any way (for several reasons, including the fact that there is not - yet

>They make "Faraday Bags" exactly for this purpose. Only "they" do not certify them in any way (for several reasons, including the fact that there is not - yet - an accepted standard for measurement) and in any case a Faraday bag (in the sense of a mesh) may be very effective at a given frequency and almost transparent to another one). A tin box should always outperform a Faraday bag in shielding RF. JFYI: https://www.forensicfocus.com/Forums/viewtopic/t=3914/ https://www.forensicfocus.com/Forums/viewtopic/t=3914/