10 Best Interconnected Smoke Alarms 2025 in the United States

The Kidde Hardwired Smoke & Carbon Monoxide Detector 3-pack is a solid choice for those looking to protect their home with interconnected alarms. It combines smoke and carbon monoxide detection into one device, which can save money and space. The alarms are hardwired with a backup of 2 AA batteries, so they stay functional even during power outages. It uses photoelectric and electrochemical sensors, providing reliable detection and reducing false alarms caused by cooking. The alarm volume at 85 decibels is loud enough to alert you effectively.

These units interconnect, meaning if one alarm detects danger, all alarms in the home will sound, enhancing safety. Installation is fairly straightforward if you have existing wiring; however, it might be a bit challenging for beginners without electrical experience. The test/hush button allows easy maintenance, and the 10-year limited warranty offers peace of mind.

Although it doesn’t include advanced smart features like mobile alerts, its dependable performance and compliance with the latest safety standards make it a practical option for families wanting a trustworthy, interlinked smoke and CO alarm system.

The First Alert SMCO500V is a battery-operated smoke and carbon monoxide alarm designed to provide reliable 2-in-1 protection for your home. Its photoelectric sensor is good at detecting smoke while reducing false alarms from cooking, which can be a common nuisance. One of its main strengths is the interconnectivity feature: when one alarm sounds, all compatible alarms will also alert you, increasing safety by making sure you hear the alarm throughout your home.

This model also offers clear voice and location alerts, so you know exactly what the danger is and where it’s coming from, which is very helpful during an emergency. Being battery-powered makes installation straightforward since you don’t need wiring, and it comes with batteries included, simplifying setup. Maintenance should be easy, as it uses standard AA batteries and includes a long 10-year limited warranty, giving peace of mind about its durability.

On the downside, since it relies on batteries, you’ll need to replace them periodically to keep it working, unlike hardwired models that connect directly to your home’s power. There are no advanced smart home integrations, so it won’t connect to apps or smartphones for remote alerts. This alarm is a strong option for anyone looking for a reliable, easy-to-install smoke and CO detector with interconnectivity and voice alerts, without the complexity of smart home features.

This DFGJLVF interconnected smoke and carbon monoxide alarm pack is a solid choice for those wanting comprehensive home safety without complicated wiring. It uses a wireless interconnect system, so when one alarm detects danger, all six alarms sound together, covering a large area up to 980 feet. Powered by sealed 10-year lithium batteries, it eliminates the hassle of frequent replacements or electrical installation, making it easy to set up and maintain.

The dual sensors—photoelectric for smoke and electrochemical for carbon monoxide—offer reliable detection of both common threats in one device, which is a real convenience and safety booster. A smart LCD screen displays carbon monoxide levels and battery status clearly, with LED lights providing quick alerts for smoke or CO. The device meets UL safety standards, ensuring it meets basic performance expectations. Its 6-pack format is great for larger homes or multi-room coverage. The package includes mounting hardware, so installation is straightforward.

While it’s wireless and easy to install, the user should ensure good signal strength throughout the home for the alarms to interconnect properly. This alarm system suits homeowners wanting long-lasting, low-maintenance protection with reliable whole-home alerting and smart features without the need for professional wiring.