The 7030BSLA (CAT 1038871) is a wire-in, 120 VAC 60 Hz single and/or multiple station photoelectric smoke and carbon monoxide combination alarm with integrated 177 candela LED strobe light specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, public housing, dormitories and other multifamily dwellings. Model 7030BSLA is certified to CAN/CSA STD 6.19-01 and ULC STD S531 and ULC STD S526. The alarms are inter-connectable with up to 18 devices, of which 12 can be smoke alarms. The BRK 7030BSLA alarm features a photoelectric smoke sensing chamber, an electrochemical CO sensor, an integrated 177 LED candela strobe light, an 85dB horn and sealed lithium battery capable of providing backup power for smoke and CO functions alarm over 10 year alarm life without replacement. The Strobe Light is designed to provide deaf and hard of hearing individuals with a visual warning of fire or carbon monoxide dangers. The Smart Strobe has separate flash patterns for smoke/heat and carbon monoxide dangers. This helps a hearing impaired person better distinguish the danger present. The 177 candela LED strobe flashes at a rate of an average of 60 times a minute. The LED flash is also sync capable so when multiple units installed, strobes can flash in unison.