
This is a true touch sensor without apply pressure. They touch with nose and it works! Make sure you place it where you want it the first time. it’s hard to separate from the Velcro once attached but it can be removed with effort. Truly dog proof adhesion to a glass surface. Smear peanut butter on it once and put dog nose to it each time you know they need to go out. Our 4 month puppy was trained to use it within 5 days.We had another bell that our puppy broke within 2 days as it was spring loaded pushing and she chewed it off the window.

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