The Alarm Lock by NAPCO PDL6600CRL/26D is a Trilogy Networx wireless digital mortise lock designed for commercial access control applications that need PIN and proximity credential access without hardwired door control panels. This left hand classroom function model features a straight lever and satin chrome 26D finish. It supports up to 5000 users with 3 to 6 digit numeric PIN codes and HID proximity cards or fobs, making it suitable for offices, schools, healthcare facilities, commercial buildings and controlled interior doors. Trilogy Networx locks help reduce door-to-door programming and audit trail retrieval by communicating wirelessly through Ethernet or 802.11B/G gateway infrastructure. The system supports remote programming, scheduled events and audit trail retrieval when used with compatible Alarm Lock Networx software and gateway hardware. The PDL6600CRL/26D includes a 1-1/4 x 4-7/8 in strike, a 1-3/8 in mortise cylinder and standard 2-3/4 in backset. Verify handing, mortise prep, gateway compatibility, credential format and installation requirements before purchase.