The Alarm Lock AL-DTMIII is a module used to transfer program data from the PC to the lock and receive Audit Trail from the lock. This Audit Trail accessory can transfer program data for up to 200 locks. It will save you time if you include this item in your purchase when you need a quick way to transmit user data and schedules from your desktop or laptop PC to your lock(s). It is simple. Users and timed lock/unlock schedules are entered into the program on your desktop or laptop, and the USB interface cord (available separately at checkout) is connected to the DTM's connection after that. The information is then transferred from the computer to the DTM. The uploading of your DTM then takes place at the lock. The audit trail can also be obtained from the lock via the DTM, which you can then show on your computer and examine. Using your Software to generate a "shell" of data and then downloading that "shell" onto this module is a common application for multiple locks. After that, you can leave your property's lock in place and upload your user data and timed lock/unlock schedules. Up to 200 locks' worth of data can be transferred at once via the DTM-III.