Door Knock Signaler - harc.com

Door Knock Signaler

Compu-TTY

  • $31.00



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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