The home kit-enabled onelink by First Alert Wi-Fi smoke+carbon monoxide alarm and the free onelink home app on your iPhone or iPad work for your peace of mind, so you know your home is safer and truly just one link away. This alarm will detect and alert you in the event of a smoke or carbon monoxide emergency. With the onelink by First Alert Wi-Fi smoke+carbon monoxide alarm you can forget about battery replacements because this alarm doesn’t need them. This alarm was designed to last for 10 years, the longest time permitted by the national fire code. This product is intended for non-professional do it yourself installation. The alarm is included in the Green builder’s 2016 hot 50 product list due in part because of its 10-year sealed battery, which increases sustainability by reducing battery waste, and because of its connectivity and collaboration to a smart home. If you would like information about a professionally installed and monitored system, please contact First Alert professional. First Alert professional is not affiliated with brk brands, Inc. Onelink by First Alert. Always connected. Always protected.