Access Control Manager Enterprise. 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 2,048 readers, in increments of 16, with the purchase of the desired quantity of AC-SW-LIC-16RCU-6-P, 16 Reader Count Software Licenses. Supports up to 500K identities and 150M stored events and fifty (50) simultaneous operators (via browser). Three (3) year appliance HW warranty begins at date of shipment.