About this item

• 2-in-1 smoke and carbon monoxide detector with 10-year sealed lithium battery (Kidde Smoke & Carbon Monoxide Detector)
• Hardwired smoke alarm with 9V battery backup operates even during power failure (Kidde Hardwired Smoke Alarm)
• Photoelectric sensor detects smoldering fires while electrochemical sensor detects carbon monoxide (Kidde Smoke & Carbon Monoxide Detector)
• Ionization sensing technology detects invisible fire particles for maximum fire detection (Kidde Hardwired Smoke Alarm)
• Test-Hush button temporarily silences false alarms and makes testing simple (Both)