The keychain is a 125KHz ID card which can be repeatedly copied, erased and written.It also can be written with an ID number.

Packaged included:
50*Grey T5577 Keyfobs
Totally 50 Pcs/set.

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

Specification:
1. 100% brand new and high quality
2. Frequency: 125 KHz
3. Thickness:4mm
4. Size: 35mm x 28mm x 4mm
5. Package included: 50pcs RFID Writable Keyfobs.
6. Material: PVC
7. Working Mode: Read-write modes - Can be used in 125KHz RFID card Copier/ Duplicator
8. Storage Capacity: 330 bit (264 free bit availability)
9. Reading distance is 0 - 10cm