Sonoff AirGuard SAWF-08P pairs a CO2 sensor and temperature/humidity sensing with Matter-over-WiFi local integration and sound+light alarms. Good choice if you want CO2 monitoring, historical logging, and native Matter connectivity in a compact unit; buyer reviews on the listing are limited so treat long-term reliability as unknown.
For smart-home users who want Matter-native, local CO2 and temp/humidity monitoring; avoid if you need proven long-term reliability data.
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