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3mi Telephone Transmitter Project (Downloadable Plans)

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Product Description

These are downloadable plans, requiring parts and assembly.


Automatically transmits both sides of a telephone conversation to a nearby FM radio with crystal clear clarity! Only transmits when phone is being used.

  • Parallel Connected - Does Not Require Disconnection of Phone
  • Battery Operated 6 to 18 Volts
  • Does Not Effect Telephone Performance
  • Works On All Extension Lines
  • Small Size 0.5" x 1.5"

A notification device, such as our BEEP10 Beeper Alert System, may be required by law for the legal use of this devie -- it is your responsibility to ensure compliance with state and other applicable laws, regulations, or restrictions on the use of this device.

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