12 zones and 1 exit on the main board. Expandable up to 20 zones by external expanders type RIO, by 1 bus of expansion RS485. Intellibus high-speed bus for communicators (IP and GPRS), or camera detectors (up to 5, which do not occupy conventional zones). Integrated RTB telephone communicator and USB port for configuration. 3 partitions, 23 users, 500 event records, 2 available calendars, 5 links. Up to 4 keyboards, multi-user function. Optional access control for 4 readers with DCM expanders. Grade 3. Large plastic box EU.