The Kidde P4010ACLEDSCA is an integrated 120V AC wire-in smoke alarm with 10-year sealed battery backup and LED strobe light that provides temporal patterns, visual and voice warnings. The model P4010ACLEDSCA is equipped with a 177 candela LED strobe light designed to notify individuals that suffer from hearing loss of impending danger. The unique design measures only 5.8cm (2.3”) in height, when mounted. The P4010ACLEDSCA will produce a steady flash warning (once per second) if smoke is detected, and sound 3 long beeps, followed by “Fire! Feu!,” repeating. When triggered by an interconnected carbon monoxide alarm (this unit does NOT detect CO) it will produce an intermittent flash warning (4 times every 5 seconds) and sound 4 quick beeps in time with red LED flashes, followed by “Warning! Carbon Monoxide! Monoxyde de carbone!,” repeating every 5 seconds. In an alarm condition, strobe flashes will synchronize with other interconnected P4010ACLEDSCA alarms. The P4010ACLEDSCA is cUL Listed and has a 10-year limited warranty.