Kidde P4010ACS Wireless Smoke Detector
- Photoelectric sensor for smoldering fires
- 10-year lithium battery, backup during power failure
- 85-decibel alarm with voice: Fire and Replace Alarm
- Up to 18 Kidde alarms interconnected, plus 6 strobes or relays
- Hardwired per specs, wiring harness included
- Ambient light sensing stops late-night chirps
- UL listed, 10-year limited warranty
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A sensible smoke alarm for homeowners linking several Kidde alarms, with voice alerts, a sealed long-life battery and no late-night chirps. The title calls it wire-free while the specs list it as hardwired, so confirm your install.
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ASIN: B076XCK8D2Model: P4010ACS-WCategory: Smoke Detectors & Fire Alarms
Overview
Homeowners extending smoke coverage get a photoelectric Kidde alarm that speaks its warnings and links with other Kidde alarms without new wiring between them. A sealed lithium battery backs it up during power failures, and light sensing holds low-battery chirps until daytime.
Interconnection is the main strength: when one alarm sounds they all do, so a fire in the basement is heard upstairs. Listing details conflict between wire-free and hardwired, which affects whether an electrician is needed.
Who it's for
Families with bedrooms far from the kitchen or basement benefit from alarms that all sound together. Those who want a combination smoke and CO alarm need a different unit, since this one senses smoke only.
Pros and cons
- Voice says fire or replace alarm
- Links with Kidde smoke, heat and CO alarms
- Sealed battery needs no replacing
- Light sensing stops night chirps
- Wire-free vs hardwired conflict in listing
- Smoke only, no CO sensing
Performance notes
Detection relies on the photoelectric chamber, where visible particles from a smoldering fire scatter light onto a sensor. Interconnection then relays the alarm to every linked Kidde unit, and the ambient light sensor delays battery chirps until it detects daylight.
Specifications
| Brand | Kidde |
|---|---|
| Model | P4010ACS-W |
| Dimensions & fit | |
| Item weight | 9.6 ounces |
| Power & efficiency | |
| Power Source | AC/DC, 10-year lithium battery backup |
| Construction & materials | |
| Enclosure Material | Plastic |
| Color | White |
| Included components | |
| Unit Count | 1 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 10 year limited |
| Other details | |
| Sensor Type | Photoelectric |
| Alarm | 85 decibels, voice alerts |
| Product Style | Hardwired |
| Builtin Media | Mounting bracket, smoke alarm, mounting hardware, wiring harness, Quick Start Guide |
| Interconnection | Up to 18 Kidde smoke, heat or CO alarms; 6 strobe lights or relay modules |
| Indicators | Green, amber and red LED |
| Features | Ambient light sensing, test-hush button |
| Certification | UL listed |
| Mfr Part Number | 21027320 |
Frequently asked questions
Does the Kidde P4010ACS-W need to be hardwired?
The specs list it as hardwired AC/DC with a wiring harness included, while the bullets say it extends coverage without additional wiring between alarms, so check your existing setup before buying.
Where should I install the Kidde smoke alarm?
Kidde advises a smoke detector and a carbon monoxide detector on every level of the home and near bedrooms.
How do I silence a cooking false alarm on the Kidde?
Press the test-hush button, which also tests battery operation.
Is the Kidde P4010ACS-W a carbon monoxide detector?
No. It senses smoke only, though it can interconnect with Kidde CO alarms.