First Alert
First Alert Onelink Safe & Sound
—
Released 2017
Best Smart Smoke Detectors · head-to-head
First Alert Onelink Safe & Sound vs X-Sense SC07-WX
A sourced, side-by-side comparison. X-Sense SC07-WX is cheaper at $44.99. Every spec and price links to its source.
X-Sense
X-Sense SC07-WX
$44.99
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | First Alert Onelink Safe & Sound | X-Sense SC07-WX |
|---|---|---|
| US price | — | $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 |
Sources — First Alert Onelink Safe & Sound: firstalertstore.com (verified 2026-08-16). X-Sense SC07-WX: the-gadgeteer.com (verified 2026-08-16).
What's the difference between the First Alert Onelink Safe & Sound and X-Sense SC07-WX?
Where the two actually differ on the specs we track (3 of 8). Matching specs are omitted.
- 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 true vs X-Sense SC07-WX false