The 440G-LZS21STLB is a GuardLock safety interlock switch featuring power-to-lock mechanism with 2 N.C. safety contacts and 1 N.O. door auxiliary contact. It utilizes solid-state contacts and comes with a standard coded actuator. The unit includes a 10-meter PVC cable and has a plastic housing. Note: Factory warranty does not apply, but includes Radwell's 2-year warranty.