This is the battery backed up version of 370L series of smokes. Your smoke is over 10 years old, and should have been replaced, or died. This smoke is a direct sub for most DICON models with respect to the mounting bezel and electrical hookup. This Model has a 9 volt battery which is included, such that the smoke works when the power is out. I like the idea. This is a US UL certified unit only for use in the United States. 10 year warranty, takes about a week for them to arrive at your door. We have these also available in bulk pricing for condo corpations and the such.