The Kidde P4010ACLEDSCOCA is an integrated 120 V AC hardwire smoke and carbon monoxide alarm with 10-year sealed battery backup and LED strobe light that provides temporal patterns, visual and voice warnings. The model P4010ACLEDSCOCA is equipped with a 177 candela strobe light (powered by Cree® LEDs), designed to notify the deaf and hard of hearing. The unique design measures only 5.8 cm (2.3”) in height, when mounted.