First Alert SA310CN3 Smoke Alarm w/ Extended Life Battery

Features and Benefits:
• Avoid costly battery replacement and never have to worry about your family's safety
• Super-loud 85 decibel alarm
• EZ access battery door means there is no need to remove the alarm from the ceiling to change the battery
• Mute /test button silences unnecessary alarms immediately and also tests the alarm function
• Blinking power light and low battery warning
• Optional theft-prevention lock makes it impossible to remove the batteries or alarm without proper tools
• Includes 9 volt extended life battery

Warranty:
• 10 year limited warranty