This reader is perfect for projects with double authentication. During working hours, all you have to do is hold the RFID card to the reader. Outside of working hours, the employee must also enter the PIN code. The reader is also ideal for situations where you generate one-time or temporary access codes for your visitors. The keypad is illuminated, so you can install the device even in unlit rooms. 2N® Access Unit M Touch Keypad < RFID reads both 125 kHz and 13.56 MHz frequency cards.