13.56Mhz Fudan 1K S50 RFID Proximity IC Card Token Tags Key fobs Keyfobs
Compatible with MIFARE Classic 1K Card (M1 Card). If your lock uses M1 card, these key fobs can work for your lock. Incompatible with other frequencies like 125kHz. Read only. Not re-writable. You cannot re-program them by a card writer.