BRK Model SLED177 (Cat 1038510) is an ADA hearing impaired strobe light specifically designed for residential and institutional applicationsincluding sleeping rooms of hospitals, hotels, motels, public housing dormitories, and other multifamily dwellings as defined in standards. BRKModel SL177 is a state of the art Strobe Light designed to provide hearing impaired individuals with a visual warning of a fire or a carbon monoxidedanger when used with smoke, heat or carbon monoxide alarms. The Smart Strobe has separate flash patterns to distinguish between smoke/heat and carbon monoxide dangers. These different patterns are to help a deaf & hard of hearing person better distinguish the danger present. The 177candela LED strobe meets UL1971 requirements and flashes at a rate of an average of 60 times a minute. The SLED177 operates on 120V AC and features a green LED that signals the unit is receiving power. Interconnectable with up to 18 devices, of which 12 can be smoke alarms. Other Contractor preferred features include a dust cover, easy twist-lock mounting bracket and a “Quick-Connect” wiring harness.