911in Strobe Controller. The SC-911 Strobe Controller connects in parallel with your phone line and passively listens for touch-tones. When 911, 9-911, or 8-911 are detected without other touch-tones around them, the SC-911 flashes the built-in 0.75in LED and activates a 12VDC switched output capable of running an emergency strobe light. A strobe light can get help to you when you need it most, providing emergency services with a clearly visible beacon to locate your home as fast as possible, and also alerting neighbors and nursing staff of your need for assistance. The built-in LED is useful for indoor applications, such as apartment complexes, schools, offices and assisted living housing. The SC-911 comes complete with a 12VDC power adapter, and also provides a set of relay contacts for user application. Applications Turn on a strobe light with a 911 call Trigger a doorstrike to enable quick and easy EMS access to your home Notify security in a gated community to allow EMS access Alert local nursing staff to an emergency call Features Detects 911, 9-911 and 8-911 calls Bright 0.75 red LED visible over 100 ft Switched 12VDC output for powering strobe lights, cameras, etc. One set of (N.O.) normally open or (N.C.) normally closed relay contacts provided Wall mountable with foam tape (included) or screws (not included) Reset by dialing any touch-tone Optional contact closure activation and reset function 1 Year Warranty Made in USA.