Usage:Fire Product name:12 Volt combustible gas alarm detector installation type:ceiling working voltage:DC10-14V working current:below 190mA alarm speaker volume:70DB at 1m working temperature:0 to 55 degree working relative humidity:less than 95%RH alarm respond delay:below 30S alarm mode:sound/LED indicator/send signal to network stability:long working density error below 5%LEL Show More