This is Telephone Ringing Signal Light ,it will be blinking once it receive the call, It is useful to use in the area which need to keep quiet example in hospital, class room, bed room.

Technical information:
    # No need the power supply, the power comes from telephone line
    # 5 x Super Blight LED
    # PCB size 1.38"  x 2.13"

NOTE: No Telephone cable, we sale only the board

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