OverDoor Indicator

ILB-21

  • Dual colored indicator light

  • Buzzer with adjustable volume

  • Long range wireless signal transmission to central monitor 

  • "Listen Before Talk" anti-collision technology  

  • Handshake signaling. Acknowledgement of signal ensures calls are received reliably

  • Automatic power increase when no handshake  

  • Battery back-up in case of power low