About This Ionization sensor technology detects invisible fire particles in smoke detector (product 2), while electrochemical sensor detects CO gas in CO detector (product 1). Both detectors operate on a 10-year lithium battery with no wiring needed, providing protection even during power failures. The CO detector (product 1) has a digital display that updates every 15 seconds to display the level of CO presence. The smoke detector (product 2) meets UL217, NFPA72, California Fire Marshall, NFPA 101, FHA & HUD requirements with a 85 dB alarm. Both detectors have LED indicators showing normal operation (green), hazards detected (red), and replace detector (amber). Overview Brand : Kidde Style : Modern Power Source : Battery Powered Alarm : Audible Sensor Type : Electrochemical, Ionization Manufacturer : Kidde
