10pcs 125kHz TK4100 RFID Read-Only KeyFobs Mixed Colors
4.20 $A pack of 10 mixed-color, read-only RFID key fobs operating at 125kHz with TK4100/EM4100 compatible chips. Each fob is pre-programmed with a unique ID and features a waterproof ABS plastic teardrop design with an attached metal keyring.