Please get document from:
seeedstudio.com/depot/datash … -Spec…pdf
That says nothing about a bi-color led or a buzzer, I have read it.
Sorry, what is mean “Reading Type from Standard design to Special design”.
Per the document mentioned above:
Standard design – card can’t be read again within the range of read antenna after read once. User must move it out of reading antenna range first, swipe card again & can be read.
Special design – card can be read continuously within the range of read antenna.