The Trilogy DL2800 shifts your access control into high gear with keyless, always locked, never locked out security, rich functionality including timed lock/unlock, and entry tracking, and the ability to quickly add and delete users. You execute management of the lock by fingertip at the lock's keypad, or by using software on your laptop or desktop PC. When using your laptop you need the computer connecting cables. (sold separately at checkout) You get a copy of the software CD with your purchase of cables. When you want to use your desktop PC, make sure to order the DTM-III hand held programming module. (DTM-III requires computer connecting cables) The software enables you to establish your access schedules, and review who entered and when. Need to establish access privileges? Done. Simply use the built-in multi-level programming functions to create your group or individual user codes, master and management codes, passage codes, and emergency or service codes. This T2 electronic Trilogy lock will play a vital role in keeping your organization operating at peak performance. "What about installing it, how easy it?" Glad you asked! Very straightforward. You can put it in yourself in the same amount of time it takes you to get through your morning email.