It can be written with an ID number too.

You can use it for door access, elevator access, parking and other fields.

If you want to buy the compatible card copier duplicator,please click below link:

Specification:

1. 100% brand new and high quality

2. Frequency: 125 KHz

3. Package included: 50pcs RFID Rewritable Keyfobs.

4. Working Mode: Read-write modes - Can be used in 125KHz RFID card Copier/ Duplicator

5. Storage Capacity: 330 bit (264 free bit availability)

6. Reading distance is 0 - 10cm

Packaged included:

50*T5577 Keyfobs