2-3/4" Backset 1-5/8" - 1-7/8" door thickness Rugged clutch mechanism insures long life & durability 150 scheduled events, including 4 quick schedules??? for programming the 4 most common time schedules in one step SC1 keyway 200 User codes: Master, Manager, Supervisor & Basic Users. Also one-time entry code Weather-resistant exterior performance Times entry allowance from 5-15 seconds Greater security with Temporary Keypad Lockout??? after 3 unsuccessful code-entry attempts Audit trail with Time/Date stamp for a printable record of all electronic activity Real time clock allows logging of events to within 1 second of accuracy Relay may be programmed to energize when one or more selected events occur 4 time-out functions allow a user to enable other users or unlock the lock for some time period without needing to return to the lock 1000 Event log Battery operated; uses 5 AA??? batteries 100% Fingertip programmable or PC programmable Windows-based software (Order # DL-WINDOWS software) Finish: 26D