{"product_id":"kidde-hardwired-smoke-carbon-monoxide-detector-combo-alarm","title":"Kidde Hardwired Smoke \u0026 Carbon Monoxide Detector - Combo Alarm","description":"\u003cp\u003eIn this review the Kidde hardwired smoke and carbon monoxide combo alarm is evaluated for homeowners who want a reliable, single-device solution for both threats. The bottom line: it is a practical replacement for existing hardwired systems that offers \u003cstrong\u003ebattery backup\u003c\/strong\u003e and continuous self-testing, making it a sensible choice for people who prioritize uninterrupted protection and straightforward installation.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e24\/7 Self-testing:\u003c\/strong\u003e Internal components continuously check the unit so homeowners get ongoing assurance the alarm is operating as expected without relying only on manual tests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual sensing technology:\u003c\/strong\u003e A photoelectric sensor detects visible particles from slow, smoldering fires while an electrochemical sensor senses carbon monoxide, providing combined detection in one alarm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterconnectable design:\u003c\/strong\u003e The alarm can be linked with other compatible alarms on the same wiring so an event in one room can alert the whole home.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery backup:\u003c\/strong\u003e Two AA batteries are included to keep the alarm functioning during power outages for dependable detection when AC power is lost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED warning indicators:\u003c\/strong\u003e A clear LED system uses green for normal operation, amber for an operating error, and red for a smoke, fire, or carbon monoxide event to make status easy to understand at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy installation:\u003c\/strong\u003e A mounting bracket included allows quick installation in four orientations to match common ceiling and wall placements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis unit is best for homeowners or renters with existing 120V hardwired alarm circuits who want a combined smoke and carbon monoxide solution that includes backup batteries and ongoing self-testing. It is especially useful for those replacing older Kidde hardwired units because it serves as a direct replacement in many installations.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include buyers who need a solution without any wiring or who require smart-home connectivity or voice alerts, since this model is focused on wired interconnect and local LED\/alarm notification rather than network features.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCombined photoelectric and electrochemical sensing covers both smoldering fires and carbon monoxide in a single alarm.\u003c\/li\u003e\n\u003cli\u003eContinuous self-testing provides passive monitoring of the device's health without user intervention.\u003c\/li\u003e\n\u003cli\u003eIncludes two AA batteries for immediate backup power and a mounting bracket for straightforward replacement installation.\u003c\/li\u003e\n\u003cli\u003eClear LED indicators and an 85-decibel alarm make events and fault conditions easy to recognize.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users report occasional false or random alarms after months of use, indicating variability in long-term reliability for a subset of units.\u003c\/li\u003e\n\u003cli\u003eIt does not include smart connectivity or remote alerts, so homeowners wanting app notifications must choose a different model.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e900-CUAR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e120V AC hardwired with 2-AA battery backup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensors\u003c\/td\u003e\n\u003ctd\u003ePhotoelectric smoke and electrochemical CO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm volume\u003c\/td\u003e\n\u003ctd\u003e85-decibel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLED indicators\u003c\/td\u003e\n\u003ctd\u003eGreen normal, amber error, red alarm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterconnectable\u003c\/td\u003e\n\u003ctd\u003eYes, compatible with other wired alarms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e10-year limited manufacturer warranty on alarm only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Kidde hardwired smoke and carbon monoxide combo alarm is a practical, cost-effective replacement for homes with existing 120V wiring who want reliable dual-threat detection and battery backup. It delivers strong everyday value through \u003cstrong\u003ecombined sensing\u003c\/strong\u003e, continuous self-testing, and easy installation, though buyers seeking smart features or guaranteed long-term consistency in every unit should consider those tradeoffs.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes this alarm work during a power outage?\u003c\/strong\u003e\u003cbr\u003eYes. It runs on house 120V wiring and uses two AA batteries (included) for backup so it continues to operate during power loss.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan it replace older Kidde hardwired models?\u003c\/strong\u003e\u003cbr\u003eYes. Many customers find it serves as a direct replacement and the included mounting bracket supports quick swap installations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat do the LED colors mean?\u003c\/strong\u003e\u003cbr\u003eGreen indicates normal operation, amber signals an operating error, and red indicates smoke, fire, or carbon monoxide event.\u003c\/p\u003e","brand":"Kidde","offers":[{"title":"Default Title","offer_id":48617842114779,"sku":"B0BRM3TYJ5","price":60.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71QMEc9iffL._AC_SL1500.jpg?v=1778431992","url":"https:\/\/gearmusthave.com\/products\/kidde-hardwired-smoke-carbon-monoxide-detector-combo-alarm","provider":"GearMustHave","version":"1.0","type":"link"}