Invite a man and a woman to help you. Give them one of the identical wooden chips each.
Turn your back and ask them to decide which of them who is going to place their chip at one of the symbols in the box. After that they close the lid.

Immediately you can – still with your back turned - say:

1. If it was the man or the woman who placed their chip in the box

2. Whether the dark or the bright side of the chip is up

3. On which symbol the chip is placed

This information is sensed by the electronics in the box and transmitted to you in up to 15 meters distance. You decide if you want to get the information on the display or just feel it by the hidden vibrator.
If you (or the spectators) look at the mahogany box, you will find nothing suspicious. Only when you know how to open it, you will see something that makes you feel like 007.