Kidde 120V Hardwire, Ion Smoke/CO combo w/ battery backup

 Intelligent Sensor Technology– Combines the detection capabilities of an ionization smoke sensor with that of an electrochemical carbon monoxide sensor
• AA Front-Loading Battery Backup
• Voice Warning
• Alarm Memory – Remembers and identifies initiating alarms
• Multi-function One Button Design includes: Test, Hush, Reset, Peak Level Memory
• End of Life Notification
• Tamper Resistant
• Interconnectable up to 24 devices (18 of which can be initiating – limit of 12 smoke alarms)