Prox Cards (125khz)
Prox cards are smart cards with a frequency of 125 kHz which can be read without inserting the card into a reader. They have a read range of approximately 4 - 5 inches.
Prox Cards (UHF)
UHF (Ultra High Frequency) cards operate at a higher frequency than standard Prox Cards (125khz), with a much longer reading distance of approximately 20-30ft.
Contactless Cards (13.56Mhz)
Contactless smart cards use radio frequency (RF) technology to interact with a reader. Each card has an antenna embedded inside the card that enables communication with the reader without physical contact.