Are you being sarcastic, or are you just an Avatar:TLA fan?
The Conductor Fruit?
Seriously though, I assumed he had a mind control fruit, but after seeing him cut off Oars' leg I'm thinking maybe his fruit gives him super thin wires or something.
If that's it though, I'll be kind of disappointed because that's basically reusing a concept Oda had already given to one of Enel's priests.