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White round smoke detector, hardwired with 10-year battery backup, 2.36 by 5.04 inches

Kidde P4010ACS-WF smart sensor, WiFi, 10-year battery backup

SKU CH-34T1-R7EQ7 MPN P4010ACS-WF

A WiFi smart smoke detector with a 10-year battery backup, voice alerts and 85-decibel alarm for whole-home safety

  • Product colorWhite
  • Product dimensions2.36 in × 5.04 in × 5.04 in
  • Product weight0.7 lb (0.32 kg)
  • Voice alarm announces hazard type for faster reaction
  • WiFi connectivity sends real-time alerts to smartphone and contacts
  • Photoelectric sensor detects visible particles from smoldering fires
  • Hardwired 120V power with 10-year battery backup ensures protection during outages
  • Test-Hush button and app testing simplify maintenance and silence false alarms

Smart smoke sensor with Wi-Fi

This Kidde P4010ACS-WF is a hardwired smoke detector that connects to a home Wi-Fi network and sends real-time alerts to the Kidde app. A sealed 10-year backup battery maintains protection during power outages. The unit uses a photoelectric sensor to detect visible particles from smoldering fires and announces the hazard type with a voice alarm. It integrates with Amazon Alexa and Google Home for voice control and smart-home routines.

Best for connected homes with existing wiring

Homeowners who want smartphone notifications and voice announcements from a single hardwired location will benefit from the Wi-Fi link and app-based testing. Builders or renters without access to 120 V AC wiring, or anyone needing a battery-only device for a ceiling without junction boxes, should look at a different model. The alarm only interconnects with other Kidde hardwired units, so mixed-brand systems will not trigger together.

Photoelectric sensor for smoldering fires

The detector relies on photoelectric technology, which is more responsive to visible smoke particles typical of slow, smoldering fires than to fast-flaming fires. If the installation requires detection optimised for rapid-flame combustion, a different sensing technology would be more appropriate. The 85-decibel alarm and LED status lights provide local warning regardless of connectivity.

How it compares

Measured against everything we stock in Alarm Kits & Motion Sensors, at today’s prices. Recalculated every night.

Price $76.99
Pricier than about 86% of the 180 comparable items (median $30.99).

Specifications

Product
Brand nameKidde
Model nameP4010ACS-WF
Part number21032065
Product colorWhite
Size & build
Product dimensions2.36 in × 5.04 in × 5.04 in
Product weight0.7 lb (0.32 kg)

Questions about this item

What comes in the box with the Kidde P4010ACS-WF and what must I buy separately?

The unit includes the smart smoke alarm with a sealed 10-year backup battery and a mounting bracket; no separate battery purchase is needed.

Which version of the P4010ACS-WF should I choose for a hardwired 120V system with app alerts?

This single model is hardwired for 120V AC, includes WiFi for Kidde app and Alexa or Google Home notifications, and uses a photoelectric sensor.

What does the 85-decibel rating mean once the alarm is installed in my hallway?

At 85 decibels the siren meets UL audibility standards for residential sleeping areas, and the voice alert announces "Fire!" or "Replace Alarm" for clear identification.

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