The pendant has special powers.

You hear it click again without you doing anything, you don't hear the people outside anymore. You try to press on the pendant again, but nothing happens. "I must be loosing it" you say to yourself. You push the incident out of your mind and return to your work at hand.

At around four o'clock you find yourself playing with the pendant again and you feel the bump. You press it and suddenly you can here the people outside again.

You realize you are hearing their thoughts not their words. You think "Maybe I can influence them." You try to implant thoughts in their head, but nothing happens. Then you hear the click again and they go silent.

You spend the rest of the day experimenting with the pendant and you learn a few things about it.

1. The pendant can only stay active for 5 minutes.
2. It take it 30 minutes to recharge.
3. It can only let you listen.
4. It must be on your person.