{"product_id":"kidde-hardwired-carbon-monoxide-detector-with-battery-backup","title":"Kidde Hardwired Carbon Monoxide Detector with Battery Backup","description":"\u003cp\u003eOur review of the Kidde Hardwired Carbon Monoxide Detector finds it best for homeowners who want a dependable, always-on CO alarm that ties into existing wiring. The single biggest reason to buy is its combination of a hardwired 120V power source with a removable 9-volt alkaline battery backup, which keeps protection active during outages. Installation is straightforward for anyone replacing a like-for-like unit, and the unit's electrochemical sensor technology targets carbon monoxide specifically, making it a practical choice for bedrooms, basements, and every level of a house.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrochemical sensor technology:\u003c\/strong\u003e Detects carbon monoxide accurately and reduces false alerts from unrelated gases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardwired with battery backup:\u003c\/strong\u003e Operates on a 120V household circuit while the included 9-volt battery keeps the alarm working during power failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree LED indicators:\u003c\/strong\u003e Green LED shows power is present while a red LED and an 85-decibel alarm signal when carbon monoxide is detected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterconnect capability:\u003c\/strong\u003e Can connect with up to 24 Kidde smoke, heat, or CO alarms and additional strobes or relays for whole-home alerting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd-of-life chirp:\u003c\/strong\u003e The unit will chirp when it reaches the end of its alarm life to clearly indicate replacement is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-year limited warranty:\u003c\/strong\u003e Warranty on the alarm only begins when the CO detector is powered on and covers defects in materials and workmanship.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis CO detector is aimed at homeowners and renters who have hardwired alarm setups or want a long-term replacement that fits existing wall boxes. It is especially useful for families who prioritize continuous protection and want the reassurance of a battery backup for power interruptions. The unit's interconnect feature also suits larger homes that need multiple linked alarms for synchronized alerts.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere are buyers who need a battery-only, portable CO monitor or a combined smoke and CO unit with a different form factor; this model is designed specifically as a hardwired CO detector and assumes access to a 120V circuit and a compatible mounting location.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReliable CO sensing with an electrochemical sensor that targets carbon monoxide specifically.\u003c\/li\u003e\n\u003cli\u003eDual power sources: continuous 120V operation plus a 9-volt battery backup for outages.\u003c\/li\u003e\n\u003cli\u003eSimple installation into existing hardwired locations and good fit for replacement units.\u003c\/li\u003e\n\u003cli\u003eInterconnect capability for whole-home alerting with other Kidde alarms and modules.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBattery life reports are mixed among users, so expect variable longevity from the 9-volt backup.\u003c\/li\u003e\n\u003cli\u003eNot a combined smoke and CO unit, so a separate smoke detector is required for full fire and CO protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eHardwired CO detector with 9-volt backup (KN-COB-IC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor type\u003c\/td\u003e\n\u003ctd\u003eElectrochemical CO sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e120V hardwired with 9-volt alkaline battery backup (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm output\u003c\/td\u003e\n\u003ctd\u003e85-decibel audible alarm and red LED indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003eGreen LED for power, red LED for CO detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterconnect\u003c\/td\u003e\n\u003ctd\u003eUp to 24 Kidde alarms; supports up to 6 strobes or relay modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e10-year limited manufacturer's warranty on the alarm only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Kidde Hardwired Carbon Monoxide Detector is a practical, value-focused choice for homes with existing hardwired alarm setups that need reliable CO monitoring and battery backup. Its electrochemical sensor, clear LED indicators, and interconnect capability make it a sensible replacement option, though buyers should be aware that backup battery longevity can vary. Overall, it offers strong continuous protection and sensible features for the price.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit work during a power outage?\u003c\/strong\u003e\u003cbr\u003eYes. It runs on the 120V hardwired power and will switch to the included 9-volt alkaline battery as a backup during outages.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this alarm be interconnected with other detectors?\u003c\/strong\u003e\u003cbr\u003eYes. It can interconnect with up to 24 Kidde smoke, heat, or CO alarms and support up to 6 strobes or relay modules for whole-home alerts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow will I know when the alarm needs replacing?\u003c\/strong\u003e\u003cbr\u003eThe unit will emit a chirp at the end of its alarm life to indicate it needs replacement, and the 10-year limited warranty applies from the date the alarm is first powered on.\u003c\/p\u003e","brand":"Kidde","offers":[{"title":"Default Title","offer_id":48619654447323,"sku":"B0009A138E","price":41.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/41Buypr9QgL._AC_SL1000.jpg?v=1778491396","url":"https:\/\/gearmusthave.com\/products\/kidde-hardwired-carbon-monoxide-detector-with-battery-backup","provider":"GearMustHave","version":"1.0","type":"link"}