The Fire-Lite MS-4 is a four-zone, conventional fire alarm control panel. The MS-4 works with System Sensor I3 smoke detectors and conventional 2 and 4 wire smoke detectors, pull stations, waterflow devices, and tamper switches. The Fire-Lite MS-4 is armed with a wealth of high-performance features, including drift compensation, maintenance alert, and freeze warning.Constructed in compliance with NFPA requirements for audible signals and ADA compliant strobes, the MS-4 uses state-of-the-art technology for early fire detection and audible/visual alerts. Also known as -Fire-Lite Alarms-Honeywell-Us 4 ZONE FIRE CONTROL PANEL - FL-MS4