Kidde Hardwired Smoke & Carbon Monoxide Detector 1 Pack - Voice Alerts

Our review of the Kidde Hardwired Smoke & Carbon Monoxide Detector, model 900-CUAR-V, finds it best for homeowners who want a single, combined alarm that covers both smoke and carbon monoxide with dependable backup power and clear voice alerts. The detector's biggest selling point is its practical combination of hardwired operation with included 2 AA battery backup, ensuring the unit stays active during power outages while also offering voice prompts that specify Fire or Warning Carbon Monoxide for faster recognition in an emergency.

Key Features

• 2-in-1 detection: Combines smoke and carbon monoxide sensing in a single unit so one device covers two major risks in a room or hallway.
• Hardwired with battery backup: Uses 120V AC wiring for continuous power and two included AA batteries to maintain protection during outages.
• Enhanced sensing technology: Photoelectric smoke sensing reduces cooking-related false alarms while an electrochemical CO sensor detects carbon monoxide reliably.
• Voice alerts and LED indicators: Crystal-clear voice messages say Fire or Warning Carbon Monoxide and three LEDs show normal, error, or alarm states for quick status checks.
• Interconnect capable: When connected with compatible alarms, a triggered unit can sound all linked detectors so occupants have more time to evacuate.
• Self-testing and warranty: Internal self-test functions monitor operation and a 10-year limited warranty covers defects from initial power-on.

Who It's For

This detector is aimed at homeowners or renovators who prefer a hardwired solution that still provides battery backup, and who value explicit voice alerts to remove ambiguity when an alarm sounds. It is especially suited to single-family homes where interconnecting multiple detectors increases overall household safety.

Customers with older wiring systems or those who need a specific legacy interconnect protocol should check compatibility before buying; some users report wiring compatibility issues with older systems. Also, buyers requiring a battery-only portable unit or a model with different mounting options should consider other styles.

Pros & Cons

Pros

• Combined smoke and CO sensing simplifies protection with one installed device.
• Hardwired power plus included AA battery backup keeps the alarm active during outages.
• Voice alerts clearly announce Fire or Warning Carbon Monoxide, helping occupants respond faster.
• Photoelectric sensing helps reduce nuisance alarms from cooking compared with ionization-only units.

Cons

• Some customers report occasional false alarms and wiring compatibility problems with older systems.
• Interconnect requirements vary by model, so additional research is needed for multi-unit setups.

Specifications

Our Verdict

The Kidde hardwired 2-in-1 detector is a practical choice for homeowners who want combined smoke and CO protection with reliable backup batteries and unmistakable voice alerts. It offers good value for those installing or replacing home alarms, provided you verify compatibility with your existing wiring and interconnect plan.

Frequently Asked Questions

Does this unit work during a power outage?
Yes, it runs on 120V AC and will operate on the included 2 AA batteries during an outage.

Will this reduce false alarms from cooking?
The photoelectric sensor is designed to be less sensitive to cooking fumes than ionization sensors, which helps reduce nuisance alarms.

Can multiple units be linked so all sound together?
Yes, it is interconnect capable with compatible Kidde models, but interconnect options and wiring requirements vary by model.