The current owner of the staff is Adrien Agreste, who uses it as the superhero Cat Noir.
The staff is shiny dark gray with a glowing green paw print near its upper end. It is retractable, and when it is not in use, Cat Noir usually has it attached to his lower back.
As Cat Blanc, the staff is the same color as the rest of his costume which is pure white.
The staff, like Ladybug's yo-yo string, is nearly unbreakable and can be extended to unlimited length. Cat Noir can split it in half or changes its length to use it as a staff, sword, bridge, javelin, or vaulting pole. When spun around at high speed, it can generate a gray-colored shield to deflect attacks or be used as a propeller to allow Cat Noir to safely land from great heights.
When the paw print button at the upper end of the staff is pressed, it slides open to reveal a screen. With this, Cat Noir can use the staff as binoculars, a tracker, a map, a phone, or an x-ray. He can also use it as a communicator to contact Ladybug or as a normal cellular phone.
In and out of "Aqua Mode", the staff can also work as a breathing apparatus for those who can't breathe underwater, such as Cat Noir himself in "Reverser" and "Queen Wasp", and Ondine in "Mayura".
Due to the staff's ability to split apart, Cat Noir can use one section for his phone and the rest for fighting, as seen in "Oni-Chan".
In "Miracle Queen", it can also be used as a periscope when under water.
In "The Dark Owl", it's revealed the staff also has an ear communicator.
In "Anansi", it's revealed the staff can be used by other people, and that it can be extended by pressing parts of the paw print.
In "Oblivio", Adrien's cellphone has multiple pictures of Ladybug, which he could've taken with his staff while transformed and when Ladybug wasn't looking, so the pictures could've transferred from his cat phone to his regular one.