(2 pack) Kidde 10-Year Battery Smoke Detector & AA Battery Carbon Monoxide Detector Value Pack

Reduces Nuisance Alarms: sensor technology reduces false alarms often caused by cooking or shower steam Double the Detection: photoelectric sensor technology provides advanced smoke detection in sensing visible fire particles associated with smoldering fires to reliably detect smoke & fire hazards, while an electrochemical sensor reliably detects poisonous carbon monoxide gas Self-Testing Alarms: internal components ensure alarm is always operating as expected. Self-testing is not a substitute for a manual push test of the alarm. Perform a button test once per week to verify proper alarm operation. 10-Year Limited Manufacturer's Warranty: warranty begins when the combination smoke & carbon monoxide alarm is powered on. If that date is unknown, it should be assumed that alarms should be replaced. The 10-Year limited warranty is not a battery performance claim.