Wrist-communicator

Wrist-communicators are a piece of technology from the Generation 1 continuity family.

Someone's been watching too much Big O.

Wrist-communicators are a form of technology used by the Autobots and the Decepticons in order to keep in contact with their human allies. Each wrist-communicator is shaped like a particular Transformer and provides the human agent wearing the communicator with a direct line to that individual Transformer.

Fiction

Fight! Super Robot Lifeform Transformers comic

The original wrist-strong bracelet.

Kenji first used his Superion wrist-communicator to summon the Autobot combiner to a battle at a baseball stadium. Fight! Super Robot Lifeform Transformers issue 5 Kenji later used his Ultra Magnus wrist-communicator to contact the City Commander for back-up when the Decepticons were laying waste to an island utopia. Fight! Super Robot Lifeform Transformers issue 6

After that, Kenji used his Ultra Magnus wrist-communicator to proudly display his allegiance to the Autobots while arguing with his rival, Makoto. Makoto countered by revealing his Galvatron wrist-communicator, displaying his support of the Decepticons. How Makoto became allied with the Decepticons is never expanded upon. Fight! Super Robot Lifeform Transformers #7

Merchandise

The wrist-communicators are based off Takara's line of transforming watches, originally sold in Japan in 1986. The line consisted of Ultra Magnus, Superion and Galvatron (all of which were featured in the comic, even when it didn't make sense). These watches were later distributed in the United States in 1993, directly by Takara, as part of the Generation 2 franchise.