The rotating disk seen opposite is a promotional device manufactured from card and aimed at promoting a new mobile phone design. The disk rotates revealing important information for potential customers.

The first piece of information displayed suggests that when phoning from home all calls are free.

Rotating the disk clockwise / anticlockwise reveals further information.

This further information suggests that calls made outside the home are cheap. The information states four minutes of talk time will only cost one minute.

On this basic example a design for a new mobile phone has been drawn in the centre. The name of the phone is printed on the edge of the card.

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