&lt;pre&gt;Power: AC110V, AC240V<br>Power frequency: 50 / 60HZ<br>Power dissipation: less than 3W<br>Use environment: temperature: -10~50 degrees. <br>Humidity: less than 95% <br>Alarm consistency: gas &lt;25% LEL<br>Alarm voice: more than 85dB<br>Product performance feature: this alarm is suitable for inspecting leakage of household gas. It is sensitive to liquefied gas, natural gas and coal gas used in cities, is convenient to install, simple operation, safe and reliable, economic and applied. When the gas consistency reaches alarm value, the alarm will send out alarm signal of sound and light, to remind you taking proper measures in time to avoid blast and poisoning. <br>&lt;/pre&gt;