# What are the best smart smoke detectors with voice control integration? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the best smart smoke detectors with voice control integration?

## Products

### Kidde P4010ACSCO-WF Smart Hardwired Smoke and Carbon Monoxide Detector with Voice Alarm
```yaml
product: kidde-p4010acsco-wf-smart-hardwired-smoke-and-carbon-monoxide-detector-with-voice-alarm
brand: Kidde
price_gbp: 66.42
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 10
connectivity: 2.4GHz Wi-Fi
temperature_range: 40 to 100°F / 4.4 to 37.8°C
carbon_monoxide_detection: Electrochemical sensor
```

- **Price:** £66.42 [^1]
- **Summary:** This hardwired 2-in-1 detector provides photoelectric smoke detection and electrochemical carbon monoxide detection, with a sealed 10-year lithium battery backup. Wi-Fi connectivity enables mobile alerts through the Kidde app, while voice alarms and compatibility with Google Home and Amazon Alexa make it suitable for connected homes.
- **Ideal For:** It suits people seeking smart smoke detectors with voice control integration because it combines Wi-Fi app notifications, voice alerts, Google Home and Amazon Alexa compatibility, and 85 dB alarm output.

### First Alert SMCO210 Smart Smoke and Carbon Monoxide Alarm
```yaml
product: first-alert-smco210-smart-smoke-and-carbon-monoxide-alarm
brand: First Alert
price_gbp: 40.57
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 10
carbon_monoxide_detection: Electrochemical sensor
```

- **Price:** £40.57 [^2]
- **Summary:** The First Alert SMCO210 is a slim, battery-powered combination alarm with photoelectric smoke sensing and electrochemical carbon monoxide detection. Its sealed 10-year lithium battery and 85 dB alarm suit homeowners and renters seeking low-maintenance protection against smoke and CO.
- **Ideal For:** It is not a strong match for smart smoke detectors with voice control integration because web-listed specifications show no connectivity or voice-control feature, although it does provide 85 dB audible alerts and 10-year battery operation.
- **Additional Sources:** [^3]

### First Alert SC5 Hardwire Smart Smoke and Carbon Monoxide Alarm - FSMCO600NVACCL1
```yaml
product: first-alert-sc5-hardwire-smart-smoke-and-carbon-monoxide-alarm-fsmco600nvaccl1
brand: First Alert
price_gbp: 95.96
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
connectivity: WiFi
carbon_monoxide_detection: true
```

- **Price:** £95.96 [^4]
- **Summary:** This 2-in-1 hardwired alarm detects both smoke and carbon monoxide and can send alerts through the First Alert app. It provides voice alerts with Heads-Up warning and supports hardwired interconnectivity so compatible alarms sound together. It is designed to reduce nuisance alarms using Precision Detection technology.
- **Ideal For:** It supports WiFi connectivity plus voice alerts and app-based mobile alerts, and it is a smart voice-enabled smoke and CO option with Nest Protect compatibility-features that align with getting voice control integration when choosing smart smoke detectors.
- **Additional Sources:** [^5], [^6]

### Kidde 21033277 Hardwired Smart Smoke and Carbon Monoxide Detector with Voice Alerts
```yaml
product: kidde-21033277-hardwired-smart-smoke-and-carbon-monoxide-detector-with-voice-alerts
brand: Kidde
price_gbp: 55.35
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
connectivity: Wi-Fi
carbon_monoxide_detection: true
```

- **Price:** £55.35 [^7]
- **Summary:** This hardwired detector provides smoke and carbon monoxide detection, voice alerts, real-time notifications through the Kidde app, and backup power from two AA batteries. It suits homeowners who want connected residential protection with Alexa and Google Home compatibility.
- **Ideal For:** This model suits smart smoke detectors with voice control integration because it combines voice alerts for smoke and carbon monoxide with Wi-Fi connectivity, Kidde app notifications, and Alexa and Google Home compatibility.
- **Additional Sources:** [^8]

### Kidde 21032064 Hardwired Smart Smoke Detector with Voice Alerts and Wi-Fi
```yaml
product: kidde-21032064-hardwired-smart-smoke-detector-with-voice-alerts-and-wi-fi
brand: Kidde
price_gbp: 61.0
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 10
connectivity: Wi-Fi
temperature_range: 40-100°F
carbon_monoxide_detection: false
```

- **Price:** £61.0 [^9]
- **Summary:** This hardwired smart smoke detector uses a photoelectric sensor, Wi-Fi connectivity, voice alerts, and a 10-year sealed lithium battery backup. It suits homeowners who want remote mobile notifications and whole-home interconnection without manually replacing the backup battery.
- **Ideal For:** It suits people seeking smart smoke detectors with voice control integration because it provides 85 dB voice alerts, Wi-Fi notifications through the Kidde app, and compatibility with Amazon Alexa and Google Home.
- **Additional Sources:** [^10]

### First Alert SC5 Smart Smoke & Carbon Monoxide Alarm
```yaml
product: first-alert-sc5-smart-smoke-carbon-monoxide-alarm
brand: First Alert
price_gbp: 95.94
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85 dB at 10 ft
connectivity: Wi-Fi
temperature_range: 40°F to 100°F
carbon_monoxide_detection: true
```

- **Price:** £95.94 [^11]
- **Summary:** The First Alert SC5 is a battery-powered smart alarm that detects smoke and carbon monoxide, sends mobile alerts, and provides voice warnings identifying the type and location of danger. It suits households replacing Google Nest Protect or wanting app-based monitoring, wireless interconnectivity, and replaceable lithium batteries.
- **Ideal For:** This model suits people seeking smart smoke detectors with voice control integration because it provides voice alerts with danger type and location, Wi-Fi connectivity, Google Home compatibility, and mobile alerts through the First Alert app.
- **Additional Sources:** [^12]

### X-Sense XS01-WX Smart Wi-Fi Smoke Detector
```yaml
product: x-sense-xs01-wx-smart-wi-fi-smoke-detector
brand: X-Sense
price_gbp: 29.52
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
alarm_volume: 85
battery_life: 1
connectivity: 2.4 GHz Wi-Fi IEEE 802.11b/g/n
temperature_range: 40-100°F (4.4-37.8°C)
carbon_monoxide_detection: false
```

- **Price:** £29.52 [^13]
- **Summary:** The X-Sense XS01-WX is a photoelectric smart smoke alarm with direct 2.4 GHz Wi-Fi connectivity and app notifications for alarms, faults, and low battery warnings. It uses a replaceable CR123A lithium battery and is suited to homeowners who want remote smoke alerts without a base station.
- **Ideal For:** It suits users seeking smart smoke detectors with voice control integration only if app-based remote alerts are sufficient, because it provides 2.4 GHz Wi-Fi connectivity and X-Sense Home Security notifications but does not offer documented voice-assistant integration.
- **Additional Sources:** [^14]

### Google Nest Nest Protect 2nd Generation Smoke and Carbon Monoxide Alarm
```yaml
product: google-nest-nest-protect-2nd-generation-smoke-and-carbon-monoxide-alarm
brand: Google Nest
price_gbp: 119.59
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
connectivity: Wi-Fi and wireless interconnect
carbon_monoxide_detection: Electrochemical carbon monoxide sensor
```

- **Price:** £119.59 [^15]
- **Summary:** The Google Nest Protect 2nd Generation is a smart smoke and carbon monoxide alarm with a split-spectrum smoke sensor, spoken alerts that identify the type and location of danger, smartphone notifications, automatic self-testing, and a pathlight. It suits households that want voice-guided warnings and remote monitoring, particularly those using Google Nest products.
- **Ideal For:** This product specifically suits people seeking smart smoke detectors with voice control integration because it provides spoken smoke and carbon monoxide warnings, identifies the affected room, sends smartphone alerts, and connects with the Nest app.

---
## References & Sources
[^1]: The Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/Kidde-Smart-Hardwired-Smoke-and-Carbon-Monoxide-Detector-with-Voice-Alarm-P4010ACSCO-WF-21031042/318246407
[^2]: First Alert Store, accessed 2026-09-13. https://www.firstalertstore.com/store/products/first-alert-10-year-battery-smoke-and-co-alarm-with-slim-design-smco210.htm
[^3]: Best Buy, accessed 2026-09-13. https://www.bestbuy.com/product/first-alert-smco210-sealed-10-year-battery-2-in-1-smoke-and-co-alarm-slim-profile-white/J7XK72GPGF/sku/12164375
[^4]: Best Buy, accessed 2026-09-13. https://www.bestbuy.com/product/first-alert-smoke-and-carbon-monoxide-detector-hardwired-white/JJ8Z8VQ4FT
[^5]: First Alert, accessed 2026-09-13. https://www.firstalert.com/products/sc5-hardwire-smart-smoke-carbon-monoxide-alarm
[^6]: The Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/First-Alert-SC5-Hardwire-Smart-Smoke-and-Carbon-Monoxide-Alarm-FSMCO600NVACCL1/337593929
[^7]: The Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/Kidde-Hardwired-Smart-Smoke-and-Carbon-Monoxide-Detector-Voice-Alerts-Interconnected-Alarm-21033277/341045164
[^8]: 1000Bulbs.com, accessed 2026-09-13. https://www.1000bulbs.com/product/232887/KIDDE-21033277.html
[^9]: The Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/Kidde-Hardwired-Smoke-Detector-with-Smart-Features-and-Voice-Alerts-10-Year-Battery-Backup-Wi-Fi-Enabled-21032064/324527130
[^10]: Mart Discover, accessed 2026-09-13. https://martdiscover.com/product/kidde-smart-hardwired-wi-fi-enabled-smoke-detector-with-photoelectric-sensor-and-voice-alerts-21032064/
[^11]: Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/First-Alert-SC5-Battery-Smart-Smoke-and-Carbon-Monoxide-Alarm-FSMCO600NVCL1/337593875
[^12]: Abt, accessed 2026-09-13. https://www.abt.com/First-Alert-SC5-Battery-Smart-Smoke-and-Carbon-Monoxide-Alarm-FATFSMCO600NVC/p/237991.html
[^13]: X-Sense, accessed 2026-09-13. https://eu.x-sense.com/products/xs01-wx-wi-fi-smoke-alarm
[^14]: Ofix, accessed 2026-09-13. https://www.ofix.ph/store/X-Sense-XS01-WX-WiFi-Smart-Smoke-Alarm-Standalone-Replaceable-Battery-p687187050
[^15]: Office Depot, accessed 2026-09-13. https://www.officedepot.com/a/products/576071/Google-Nest-Protect-Smoke-And-CO/