# Google Nest Protect (2nd Gen, Battery) vs Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF): specs and price compared

A sourced, side-by-side comparison of the Google Nest Protect (2nd Gen, Battery) (Google) and Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF) (Kidde) among smart smoke detectors.

## Side by side

| Spec | Google Nest Protect (2nd Gen, Battery) | Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF) |
| --- | --- | --- |
| US price | $119 | not published |
| Brand | Google | Kidde |
| Released | 2015 | — |
| Sensor type | split_spectrum | photoelectric |
| Detects co | Yes | Yes |
| Power | battery | hardwired |
| Interconnect | wireless | wired |
| App alerts | Yes | Yes |
| Voice location alerts | Yes | — |
| Sensor life yr | 10 | 10 |
| Self test | Yes | Yes |

## Key differences

- Sensor type: Google Nest Protect (2nd Gen, Battery) split_spectrum vs Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF) photoelectric
- Power: Google Nest Protect (2nd Gen, Battery) battery vs Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF) hardwired
- Interconnect: Google Nest Protect (2nd Gen, Battery) wireless vs Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF) wired

## Sources

- Google Nest Protect (2nd Gen, Battery): https://support.google.com/googlenest/answer/9229922?hl=en (support.google.com, verified 2026-08-16)
- Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF): https://www.kidde.com/products/smart/smoke-carbon-monoxide-alarm-with-indoor-air-quality-monitor (kidde.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/smart-smoke-detectors/google-nest-protect-2nd-gen-battery-vs-kidde-smart-smoke-co-aq/
Cite: Per The Front Desk Review, Google Nest Protect (2nd Gen, Battery) ($119) vs Kidde Smart Smoke + CO Alarm with Indoor Air Quality Monitor (P4010ACSCOAQ-WF) (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-smoke-detectors/google-nest-protect-2nd-gen-battery-vs-kidde-smart-smoke-co-aq/
License: CC BY 4.0.