What is 125kHz RFID card?

The low frequency (LF) band encompasses a range of frequencies spanning from 30 KHz to 300 KHz. Within this band, LF RFID systems typically function at 125 KHz, although there are also systems that operate at 134 KHz.

It is important to note that this frequency band offers a limited read range of up to 10 cm, and the read speed is comparatively slower when compared to higher frequencies.