Alarmlock Trilogy Electronic Combination Lock, Double-Sided. 2,000 User Access using PIN-Code and/or HID Prox card/fob with Multi-LevelAccess Hierarchy: Master, Manager, Supervisor and Basic User. Access Door Lock Users are individually programmed to use a card only, code only, or for the highest security, both card and code. PIN codes: 3-6 digits Up to 40,000 Event Audit Trail. 500 Scheduled Events. Battery-Operated. Primary Door Side has Data Port for Programming Lock and Querying Audit Trail is on Primary Side of Door along with Functioning Mechanical Key Override.