Squawker

Squawkers (リスター) are communicator devices used by the Fusion Fighters and the Xros Heart United Army in Digimon Fusion. They are worn around the wrist.

Digimon Fusion
makes nine Squawkers which distributes to Mikey Kudo, Angie Hinomoto, Jeremy Tsurgi, and the. When Jeremy is suspended in a giant bamboo spire, Mikey uses the Squawkers to communicate his plan to him.

When Nene Amano is captured by in the Sky Zone, Mikey offers  a Squawker for a temporary alliance but is rejected. Afterward, when Nene is successfully saved due to the Fusion Fighters' help and Sparrowmon's feelings toward them soften, Sparrowmon retrieves that very same Squawker.

Later, in Canyon Land, Mikey uses the Squwaker to tell Nene and to use "Ouroboros Gate" so that they can escape.