How they work
RFID cards use radio frequencies to communicate with a reader, establishing a wireless connection. The card’s chip is activated when it’s brought into the reader’s electromagnetic field.
What they contain
RFID cards have a small, embedded chip and antenna that’s not visible. The chip’s integrated circuit (IC) contains memory that can be programmed for various uses.
How they’re used
RFID cards are used for a variety of applications, including access control, public transportation ticketing, and cashless vending
