Minimize the accidental pick-up of your calls with this two LED line in-use indicator. The tiny, low cost, line-powered, easy-to-build FK318 circuit displays a green signal if the line is clear and a bright red LED to indicate when a line is picked up.

Technical Specification

  • Power Supply : Not required.
  • PCB Dimensions : 0.77" x 0.81" x 0.6"
  • Display : 1 Red LED and 1 Green LED 3 mm.
  • Recommended Housing : FB11

Download Manual Click Here

This website uses cookies for best user experience, to find out more you can go to our Privacy Policy  and  Cookies Policy