Proximity Cards are small credit-card sized cards that are used with RFID Attendance Readers. They are used by flashing them in front of the screen of the reader, marking the attendance of the employee. They are also used for Door access control in some offices. Therefore, these cards are essential for utilizing the Attendance Reader at your office. They utilize a wireless technology called RFID (Radio Frequency Identification) to store your details and enable authentication and recognition.