# Google Nest Protect (2nd Gen, Battery) vs Ring Alarm Smoke & CO Listener: specs and price compared

A sourced, side-by-side comparison of the Google Nest Protect (2nd Gen, Battery) (Google) and Ring Alarm Smoke & CO Listener (Ring) among smart smoke detectors.

## Side by side

| Spec | Google Nest Protect (2nd Gen, Battery) | Ring Alarm Smoke & CO Listener |
| --- | --- | --- |
| US price | $119 | not published |
| Brand | Google | Ring |
| Released | 2015 | — |
| Sensor type | split_spectrum | audio_listener |
| Detects co | Yes | Yes |
| Power | battery | battery |
| Interconnect | wireless | wireless |
| App alerts | Yes | Yes |
| Voice location alerts | Yes | No |
| Sensor life yr | 10 | — |
| Self test | Yes | No |

## Key differences

- Sensor type: Google Nest Protect (2nd Gen, Battery) split_spectrum vs Ring Alarm Smoke & CO Listener audio_listener
- Voice location alerts: Google Nest Protect (2nd Gen, Battery) Yes vs Ring Alarm Smoke & CO Listener No
- Self test: Google Nest Protect (2nd Gen, Battery) Yes vs Ring Alarm Smoke & CO Listener No

## Sources

- Google Nest Protect (2nd Gen, Battery): https://support.google.com/googlenest/answer/9229922?hl=en (support.google.com, verified 2026-08-16)
- Ring Alarm Smoke & CO Listener: https://www.lowes.com/pd/Ring-Ring-Alarm-Smoke-CO-Listener/5005536667 (lowes.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/smart-smoke-detectors/google-nest-protect-2nd-gen-battery-vs-ring-alarm-smoke-co-listener/
Cite: Per The Front Desk Review, Google Nest Protect (2nd Gen, Battery) ($119) vs Ring Alarm Smoke & CO Listener (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-smoke-detectors/google-nest-protect-2nd-gen-battery-vs-ring-alarm-smoke-co-listener/
License: CC BY 4.0.