This easy-to-install First Alert Z-Wave ZCOMBO-G Smoke and Carbon Monoxide Alarm is designed for compatibility with certified First Alert enabled Z-Wave Devices. It can send you mobile alerts in the event of an emergency and includes an insect-screened photoelectric smoke sensing chamber, an electrochemical carbon monoxide sensor, an 85-decibel horn, a tamper-resistant battery door, and a single test/silence button. This alarm is specifically designed for residential and institutional applications such as sleeping areas in hospitals, hotels, dorms, and multifamily dwellings defined in standard NFPA 101. Fully tested, it complies with UL217, UL2034, CSFM, NFPA 720, NFPA 101, and other standards modeled on those agencies. This combination alarm also meets building codes requiring a battery-operated Z-Wave wireless smoke and carbon monoxide detector, as well as ICC codes.