Door Knock Signaler
Flashes light with knock on the door. As BONUS it can be turned on and used as a flashlight when needed.
- 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.