Product Feature
1. This EM4100 key fobs can only be added to your 125KHz machine, can NOT copy any of your keys cards, can NOT work on 13.56MHz machines.
2. Each key fobs with a unique ID number on it, can not be modified.
3. Can be added as door opening card on 125KHz access control machine or checking cards on attendance machine.
4. Widely used at apartment, office, school and any other places where need access control or time attendance mission.
5. 100% brand new and high quality ABS material, fully waterproof.
6. Support Read only, NOT writable, you can add it to your 125KHz device, but you can not use it copy any of your current cards.

Product Description
1.Material: ABS waterproof material
2.Support: Read only, not writable.
3. Working Frequency:125KHz
4. Chip: EM4100 chip, data unchangeable.
5. Each keyfob has metal key-ring and unique ID number on it.
6. Standard: ISO14443A
7. Package included: 100pcs black keyfob