Be alerted to the type of danger and its location in your home with First Alert’s SMCO210V 10 year sealed battery combination smoke and carbon monoxide alarm with voice and location alerts. This 2-in-1 alarm provides convenient protection against both threats and meets new industry standards.First Alert’s precision detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergencyVoice and location alerts tell you what the danger is and its location to help you escape safelyProvides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install alarm10 year sealed battery eliminates battery replacements and low battery chirps for the life of the alarmSlim profile design is half the depth of a standard alarmEnd-of-life warning lets you know when it’s time to replace the alarmTest/silence button for efficient testing to ensure alarm is working properly