The First Alert SM210V 10 year sealed battery smoke alarm with voice and location alerts helps guide your escape to safety. Utilizing First Alert’s precision detection advanced sensing technology that complies with new industry standards, the SM210V provides reliable and convenient protection.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 the location of danger to help you escape safely10 year sealed battery eliminates battery replacements and low battery chirps for the life of the alarmEnd-of-life warning lets you know when it’s time to replace the alarmSlim profile design is half the depth of a standard alarmTest/silence button for efficient testing to ensure alarm is working properly