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Comment: Re:Back-compat? (Score 1) 65

by RfidShield (#19054235) Attached to: RFID Guardian Protects Your Privacy
No, this is an active jamming device, and as the other readers indicate, may only work at a particular frequency or communications protocol. However Smart Tools offers an RFID Shield - a passive device that prevents your RFID card from being detected or communicating, and is independent of frequency or protocol. There's info and a picture at:

All great discoveries are made by mistake. -- Young