The Alarm Lock DL2700IC-26D-S Systems Inc TRILOGY IC Schlage Prep Less Core is a keyless entry security system that uses a radio frequency identification (RFID) tag to identify authorized users. The system includes a keypad, a transponder, and a receiver. The keypad allows authorized users to enter a code to unlock the system. The transponder is embedded in the keypad and is read by the receiver. The receiver sends a signal to the lock to unlock it. The Alarm Lock DL2700IC-26D-S Systems Inc TRILOGY IC Schlage Prep Less Core is tamper-resistant and has a battery backup.