I didn't know that different frequencies would affect blocking effectiveness, but it makes sense. My initial design was for some kind of copper mesh, but my fri

I didn't know that different frequencies would affect blocking effectiveness, but it makes sense. My initial design was for some kind of copper mesh, but my friend, practical and cost-cutty as he is, said to go with tinfoil to get a similar effect. Those idstronghold wallets look a touch more professional than my duct-tape wallet.