Este artículo es un lector USB de tags RFID de frecuencia 125Khz. La distancia de la lectura es de hasta 8cm, que se utiliza extensamente para el
125kHz RFID Reader for Em4100, Tk4100, Tk28 Chip Card Readers - China RFID Reader, Card Readers
Usb Rfid 125khz Id Card Reader Em4100 Tk4100 Card - Read-write Device - AliExpress
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Lector RFID Em4100 USB – 125Khz - Electronilab
125Khz USB RFID Contactless Proximity Sensor Smart ID Card Reader EM4100
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RFID 125KHZ EM4100 USB Port NFC IC Smart Card Reader 13.56MHz MF/S50/S70 Free Drive Support for Window Linux Vista Android