Next time you're not sure if someone is telling the truth, get this little gadget out and find out for sure. For many years scientists tried to innovate a successful lie detector, American researchers eventually developing the psychological stress evaluator (PSE) and the voice stress analyser (VSA).

Both these two inventions are used in the technological make up of the Truth Machine, which by picking up micro tremors in the voice not detectable to the human ear, and measuring the amplitude of the upper and lower sidebands of the frequency spectrum of the voice, detects stress.

The input is analysed, and results shown visually in a column of LED lights, indicating green for truth and red for lying. If the LED illumination reaches the top, someone is telling a real big porky pie.

The Machine is not 100% accurate all the time and no responsibility is taken for marriage break-ups etc....

1 9V Battery Required.
Approx 4 x 9 x 15 cm.