Large Image Flashes light with knock on the door. As BONUS it can be turned on and used as a flashlight when needed. Features: Senses door knock vibration Flash of extra bright light responds for several seconds Sensitivity switch ensures maximum results Lifetime LED light never needs replacing Use at home or away Simple to install. Uses 9 volt battery (not included) Permanently install with a screw, attach to door with velcro or use hanging bracket included.
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