Quantity 10 RFID Cards.

Operation Frequency: 125KHz
Detecting distance: 8-20cm
Thickness: 0.8mm
Chip type: TK4100, EM4100.

These work well with any standard 125Khz RFID Reader,
Each has unique ID printed on the ID Card.

I also have RFID Lock System Controllers, Magnetic Locks and RFID Key Tags available.