There is a also a growing market for the block heater monitor in the deaf and the hard of hearing community.  Most people just listen to see if they can hear the block heater hissing, but for many, especially the hard of hearing, this is impossible to do. We have already sold many units to deat or hard of hearing clients in Timmins, Ontario and they love our product. I remember one case in Timmins where a hard of hearing person bought the block heater monitor immediately without even giving me time to explian how it worked.  Since then, he has told me that he is 100% satisfied with this product.  Now he knows what was wrong with his car when he had starting problems in the past winter.  He feels more confident to go out in the cold weather with his vehicle now.