TK4100
The TK4100 is a 125kHz RFID chip widely used in low-frequency contactless identification systems. It features a unique read-only 64-bit ID number pre-programmed in the factory. Compatible with EM4100 protocol, the TK4100 is ideal for access control, time attendance, and identification cards. Its low cost and strong compatibility make it a popular choice for basic RFID applications.
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