Please ensure that your lock system operates at the same 13.56MHz frequency as these key fobs (tags). They are not compatible with 125kHz frequencies.
These key fobs are read-only and cannot be re-written using a card writer as they are pre-programmed.
If your lock uses M1 card, these key fobs are compatible.
These key fobs are suitable for 13.56MHz RFID proximity access control systems and ID management systems, such as registering them as new keys for your RFID door lock.
Each key fob has the approximate size of 1.58*1.26*0.18 inches and is made of black ABS plastic. The package includes 100 pieces.