content: Product works sporadically when mounted to the door chime's case. However, our poodle's bark apparently is in the same frequency as the doorbell. The dog would bark, the doorbell would go off, we'd answer the door and there'd be nobody there. We finally discovered that the dog's bark caused the bell to ring, when we thought the bell caused the dog to bark. Product lasted several years, died, and the replacement was even more sporadic than the original. I would not recommend this product, unless you just want to keep track of your dog.