10 Best Smoke And Co Alarm 2025 in the United States

The X-Sense SC06-W combination smoke and carbon monoxide detector offers solid protection for your home with its dual sensors—photoelectric for smoke and electrochemical for CO detection. It's battery powered with a sealed 10-year lithium battery, meaning you won't need to worry about changing batteries for a decade, which is a big convenience and safety plus. The wireless interconnection feature is useful: when one alarm sounds, all linked alarms will go off, helping alert everyone in the house quickly. You can connect up to 24 of these alarms, providing flexible coverage for larger homes. However, this model does not have Wi-Fi or smart home integration, so you won’t get remote alerts on your phone or app control. The test/silence button makes it easy to check the system or quiet a false alarm right at the unit. Installation comes with screws and anchors, making setup straightforward.

The size is standard and should fit most installation needs without being bulky. This alarm is ideal for those wanting reliable, long-lasting, interconnected detection without the complexity or cost of full smart-home features.

The Kidde Smoke & Carbon Monoxide Detector offers reliable 2-in-1 protection by combining photoelectric and electrochemical sensors, which detect both smoke and harmful carbon monoxide. Its standout feature is the built-in 10-year lithium battery, which means you won't have to worry about battery replacements or annoying low-battery chirps for a full decade. This long lifespan can save you money and hassle over time.

The alarm uses LED lights to clearly show if everything’s okay, if there’s an error, or if smoke or CO is detected, and it sounds a loud 85-decibel alarm to alert you promptly. Installation is simple—no wiring needed—just mount the bracket and twist the alarm into place. A test and hush button lets you easily check the device works and temporarily silence false alarms, which are less frequent thanks to enhanced sensing technology that reduces false triggers from cooking. The device meets up-to-date safety standards (UL 217 and UL 2034), ensuring it follows rigorous testing.

This model does not support interconnectivity, meaning each alarm works independently rather than linking with others in your home, which may be a drawback if you want your alarms to sound simultaneously. It also lacks smart features like smartphone alerts or voice integration. If you want a straightforward, low-maintenance smoke and CO alarm with a very long battery life, this Kidde model is a solid choice. Just remember to manually test it weekly and replace it after 10 years as recommended.

The X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector offers a solid safety solution for home use. This model features both a photoelectric smoke sensor and an electrochemical CO sensor, which enhances its reliability in detecting both smoke and carbon monoxide. One of its standout strengths is the ability to interconnect up to 24 devices, creating a robust safety network throughout your home. This feature ensures that if one alarm detects danger, all interconnected units will sound an alarm, providing an early warning system that can cover a large area, up to 820 feet in transmission range.

The built-in 10-year lithium battery is also a significant advantage, as it eliminates the hassle of frequent battery replacements, adding to the convenience and long-term reliability of the device. Additionally, the informative LCD display provides real-time CO levels, battery status, and operational information, making it easy to monitor and maintain. On the downside, this model does not support Wi-Fi connectivity, which could limit its integration with other smart home systems. For users seeking Wi-Fi capabilities, the SC07-WX model would be a better fit.

The units come with a 60-day money-back guarantee, a 5-year warranty, and lifetime technical support, adding peace of mind. This smoke and CO alarm is best suited for homeowners looking for a comprehensive, easy-to-install safety system without the need for smart home integration.