First you need to identify the type of fob or car that you have. Usually there will be markings that will give you a clue. But that is not enough, you will require multiple rfid reading and writhing machines. The reason for this is because there are different frequency’s and one reader / writer is not enough.

Once you have acquired the correct readers writers you can try reading your rfid fob to find out what frequency it is. There can be many formats of cards and fobs under the same frequency. Listed below are some of the tags and what frequency they fall under.

13.5Khz

Mifare S50 1K

Mifare S70 4K

Mifare Ntag 213

Mifare Ntag215

Mifare Ntag216

Ultralight

Ultralight-C

Ultralight-EV1

HID IClass Legacy

HID IClass Elite

HID IClass SE