The Zetsumerise Driver is a transformation belt used by characters in the Kamen Rider Zero-One series. It allows the user to transform into a Kamen Rider by inserting a special device called a Zetsumerise Key. Each key represents a different ability or form, enabling various powers and combat styles. This device is central to the series' plot, as it symbolizes the conflict between humans and artificial intelligence. The Zetsumerise Driver is equipped with advanced technology, reflecting the show's themes of innovation and the impact of technology on society.