Squawker

Wristers are communicator devices used by Xros Heart and Xros Heart United Army in Digimon Xros Wars. They ae worn around the wrist.

Digimon Xros Wars
makes nine Wristers which distributes to, , , and the. When Zenjirou is sunpended in a giant bamboo spire, Taiki uses the Wrister to communicate his plan to him.

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