Hermione's Time-Turner

Hermione's Time-Turner is a magical device that allows the user to travel backward in time for a short period, typically a few hours. It resembles a small hourglass on a necklace, and when activated, it enables the wearer to attend multiple classes simultaneously or revisit past moments. The device is highly regulated to prevent timeline disruptions, as even minor changes could have significant consequences. In the story, Hermione uses it carefully to attend extra classes and later to help save other characters, demonstrating its powerful yet risky nature.