EM4100 RFID Blue Eye Key Fob Tag - Unique ID

$1.19 ea

  • Part no.: 2109851
  • Manufacturer: Parallax
  • Manufacturer no.: 28161
  • RoHS Compliant
# of units Price
1+ $1.19
5+ $1.09
25+ $0.99
100+ $0.94

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RFID Blue Eye Key Fob Tag

These EM-4100 family products are designed to work with our Serial RFID Card Reader (#28140) and the USB RFID Reader (#28340) and are considered passive tags. Each tag has a unique 10 digit ID, so multiple tags can be used in a single project and may be purchased from Parallax in any quantity.

Note: In accordance with U.S. Patent Nos. RE40,145; 5,817,207; 6,036,099; 6,214,155; 6,514,367; and 6,557,766.


  • EM4100 Family Passive Tags
  • 125 kHz activating frequency
  • Unique ID
  • Readable from 2 to 5 inches of RFID reader
  • Keychain tag for attachment

Compatible with These Kits

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