The TK4100​ is a low-frequency (LF) 125 kHz read-only RFID chip, widely used as a low-cost alternative to the EM4100/EM4200 family. It is primarily designed for simple identification tasks in access control and as..

The EM4200​ is a low-frequency (LF) 125 kHz read-only RFID chip​ manufactured by EM Microelectronic. It is widely used as a direct, high-performance replacement for the classic EM4100/4102 series in access control..

The TK4100​ is a low-frequency (LF) 125 kHz read-only RFID chip, widely used as a low-cost alternative to the EM4100/EM4200 family. It is primarily designed for simple identification tasks in access control..