EM4100 125Khz RFID Card Read Module, RDM6300, RDM630, UART
Main Product link
https://www.electrodragon.com/product/125khz-em4100-rfid-card-read-module-rdm630-uart-output-arduino-shield/
Documentation:
https://w.electrodragon.com/w/RDM6300
Order keys or cards:
https://www.electrodragon.com/product/em4100-125khz-rfid-keys/
https://www.electrodragon.com/product/em4100-125khz-rfid-card-compatible-with-rdm630/