Access Control Manager Professional. Web-Based PACS Appliance for 16 Readers, includes: Physical appliance. Embedded Linux OS & Open LDAP licenses for configuration database. Access Control Manager Security Management Software License. One (1), AC-SW-LIC-16RCU-6-P, 16 Reader Count Software License. Total reader capacity can be expanded from 16 to 32 readers with the purchase of the AC-SW-LIC-16RCU-6-P, 16 Reader Count Software License. Supports up to 500K identities and 75M stored events and fifty (50) simultaneous operators (via browser). Three (3) year appliance HW warranty begins at date of shipment.