Xentry is a 2 wire HD videointercom range basically composed by 2 videokits: 1XN100 and 1XN300. Both are one-way and contain 1x 7" XN700 monitor, 1 door station and 1 power supply. The difference is that  the door station for 1XN100 is XN100 (1 call button and RFID/MIFARE reader), while door station for 1XN300 is XN300 (keypad). For further info click HERE.