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EM-18 RFID Proximity Card Reader Module 125KHz RFID Module Product Name: EM18 1 VCC 5V 2 GND GND 3 BEEP BEEP AND LED 4 ANT NO USE 5 ANT NO USE 6 SEL HIGH IS RS232,LOW IS WEIGAND 7 RRL232 TTL232 8 D1 ...