Blue RFID Blocking ID Badge Holder (Holds 2 Cards) - SkimSAFE FIPS 201 Approved - Dual Sided Shield Blocks 13.56MHz Radio Signal - Specialist ID RFID Blocking 2 Card Holder FIPS 201 Approved RFID ID Badge Blocker Hangs Vertical or Horizontal Helps to Prevent Your RFID Card Info From Being Skimmed Blocks 13.56MHz Radio Frequency Signal