On 6/20/2013 10:48, Jim Kinney wrote: > wrap your RFID cards in this stuff: > > http://www.adafruit.com/products/1168 > > or go anti-emf crazy and buy a larger blob from: > > http://www.lessemf.com/fabric.html Or go to the grocery store and buy a 75 foot roll of heavy duty aluminum foil for less and make dinner with it, too. :)