Internal RFID card reader for installation in 2N^® Helios IP Force intercoms. Allows the use of EM4100, EM4102 and HID Proximity cards. Another two switches, two logical inputs and a Wiegand interface are available. It is compatible with the 2N^® Helios IP Force two-button and pictogram models. It also includes a security switch to signal when the front panel is opened.