I want to know the answer to the following question:
What did the characters use to transform themselves into special Digimons?
All the background I'm provided with is that "The fourth Digimon series, which began airing on April 7, 2002, radically departs from the previous three by focusing on a new and very different kind of evolution, Spirit Evolution, in which the human characters use their D-Tectors (this series' Digivice) to transform themselves into special Digimon called Legendary Warriors, detracting from the customary formula of having digital partners.". Is that enough to answer the question?
Answer: yes