Please read this first. " @The speaker is not inclued because it is not allowed to ship by airplane "

This circuit device is a mini communication tool, well known to be used at home, with a microphone which is connected to a loudspeaker to another room.

Technical information:
- Require power supply : 6-12VDC.
- Consumption : 40mA (talking), 182mA (push SW tone)
- There is the calling tone.
- max. length of shielded cable which board can work with are 50m.  ( comes in the package only 30cm for experiment )
- PCB dimensions : 2.73" x 2.03" (big board) 1.15" x 0.76" (small board)

Download User Manual