The Bara Bara no Mi is a Paramecia-type Devil Fruit that makes the user immune to slashing attacks. The user can split their own body apart into pieces and control them. These pieces that have been split can levitate as the user wishes and can even get reattached. Only the feet have to stay on the ground.
Anyway a Bara Bara man has a certain distance limit to his ability. There is a 200 Bara Bara diameter circle around the point where the person touches the ground. Outside of that distance, he cannot control those parts of his body.