125Khz rfid module * Weigand 26/ RS232 for option * Low frequency 125Khz * Customized size acceptable * Factory since 1992 M6630 RFID Reader Module 1. Introduce M6630 is a module to read 125 KHz RFID card .It adopt advanced RFID circuits and embedded microcontroller design, which receives the data of EM4100 card, compatible ID card combined with efficient decoding algorithm. It is used for access ...