ChiTronic® Wireless 3-Level Adjustable Sensitivity Cigarette Smoke Detector, Sound & Light Alarm, Powered by DC/9V Battery

Do not suggest to use in below environment:
1. Near the fireplace
2. Dust, steam, fog, pollution gas place
3. Relative humidity ≥ 95%
4. Wind speed ≥ 5m/s

from Consumer Electronics Store http://cestore.net/security-surveillance/horns-sirens/ChiTronic%C2%AE-Wireless-Adjustable-Sensitivity-Cigarette.html?pid=B018JZM762