A small portable safe.
A small security device that can used to securely store small objects.
In order to unlock this device, you need to push the buttons on its face in the correct sequence. Each button will light up an LED on the main display, and only when all LED's are illuminated in a specific order will the safe open. The order required is to illuminate each LED in a clockwise direction one after the other. You can start from any point, but pushing a button out of sequence resets the safe back to the its original state.