Circular smoke/CO alarm — sits facing forward, its green indicator ring and speaker vents visible — exposed wiring and a small white connector extend from its side against a white background.
This product has been Discontinued

Wire-Free Interconnected AC Hardwired Smoke Alarm

P4010ACS-W

The P4010ACS-W is an AC/DC powered smoke alarm with 10 year battery backup that features supervised wire-free interconnect capability and provides enhanced intelligibility for users.

  • 10-Year Sealed Lithium Battery: eliminates late night battery chirp

  • Voice Notifications

  • Bug Screen: Protects alarm from insect ingress

  • Flashing LED Status Ring: allows easy identification of current state of alarm

Helpful Resources

Upgrade to

This model is to be replaced with Smoke Alarm, Wire-Free Interconnect, Hardwired with AA Backup Battery

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Circular Kidde wire‑free smoke alarm showing a green status LED; ventilation slots and exposed red/black wiring visible against a white ceiling‑mount background.View Product

Helpful Resources

Click on the video to learn more about how to install your Kidde Smoke alarm.

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A red fire extinguisher and three Kidde smoke/CO detectors (one boxed) stand arranged on a light wood tabletop against a pale wall, accompanied by a round "#1" safety-brand badge.

Why Kidde

As North America's #1 home fire safety brand,* Kidde has been working to help make your home the safest it can be for more than 100 years. Now, our latest smoke alarms and combination smoke + carbon monoxide (CO) alarms are bringing you the next level of fire and CO safety. Help protect what matters most in your life with features like cutting edge technology that send fast alerts to give your family more time to get out safely. And enhanced sensing technology that reduces false alarms often caused by cooking.

*Based on total household installations as of December 2023.