This is a plastic fob key with a 125KHz TK4100 compatible RFID chip inside. It is considered passive tags and each has a unique identification. It has a metal attachment needed to put a key on It.
Each key fob has laser engraved unique identification
A key ring included
Readable from 2 to 5 inches of RFID reader
Response frequency: 125KHz
Chip type: TK4100
Operating temperature: -40? to +85?
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