We used this when my mum's dog stayed here. She will NOT tell you to use the potty but will come to the door. If you miss her "que" gifts will be dropped on the floor without warning. She's almost 4 years old and potty training an older passerby most likely won't happen. So I found this. It's very delicate. It sounds as long as there is a person or animal nearby. There are many annoying options to choose from to notify you. A LOT OF! We chose Bing Bong. Hello in a male voice. This was the least disruptive and worked well. The range is large. I ended up putting tape on the sides so it only detects straight ahead. This fixed many false positives. switched off at night. The cat loved turning it off! The only annoying part of it was resetting the notification picker every day. Crawling through them all until you found "The One" was painful, but it wasn't worth wiping the gifts off my carpet every day!
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