# First Alert Onelink Safe & Sound vs X-Sense SC07-WX: specs and price compared

A sourced, side-by-side comparison of the First Alert Onelink Safe & Sound (First Alert) and X-Sense SC07-WX (X-Sense) among smart smoke detectors.

## Side by side

| Spec | First Alert Onelink Safe & Sound | X-Sense SC07-WX |
| --- | --- | --- |
| US price | not published | $44.99 |
| Brand | First Alert | X-Sense |
| Released | 2017 | — |
| Sensor type | photoelectric | photoelectric |
| Detects co | Yes | Yes |
| Power | hardwired | battery |
| Interconnect | wireless | app_only |
| App alerts | Yes | Yes |
| Voice location alerts | Yes | No |
| Sensor life yr | 10 | 10 |
| Self test | Yes | Yes |

## Key differences

- Power: First Alert Onelink Safe & Sound hardwired vs X-Sense SC07-WX battery
- Interconnect: First Alert Onelink Safe & Sound wireless vs X-Sense SC07-WX app_only
- Voice location alerts: First Alert Onelink Safe & Sound Yes vs X-Sense SC07-WX No

## Sources

- First Alert Onelink Safe & Sound: https://www.firstalertstore.com/store/products/onelink-smoke-and-carbon-monoxide-alarm-with-amazon-alexa-1039102.htm (firstalertstore.com, verified 2026-08-16)
- X-Sense SC07-WX: https://the-gadgeteer.com/2024/01/10/x-sense-sc07-wx-wi-fi-connected-smoke-and-carbon-monoxide-detector-review-know-whats-happening-even-when-youre-not-at-home/ (the-gadgeteer.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/smart-smoke-detectors/first-alert-onelink-safe-and-sound-vs-x-sense-sc07-wx/
Cite: Per The Front Desk Review, First Alert Onelink Safe & Sound (not published) vs X-Sense SC07-WX ($44.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-smoke-detectors/first-alert-onelink-safe-and-sound-vs-x-sense-sc07-wx/
License: CC BY 4.0.