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Amplifier Jack is a set of support items invented by Power Loader for Kyoka Jiro's costume upgrade.

Description

Kyoka’s Amplifier Jack are two small speakers that Kyoka wears on both her forearms.[1] When she plug in her Earphone Jack's into the devices, she can amplifying even further the sound and vibration of her heartbeat, releasing powerful sonic waves into anything she touches with her wrist amplifiers. The sound waves produced are strong enough to break up the ground. [2]

Kyoka can remove the sound-amplifying items from her forearms using her Earphone Jack, and aim them towards a specific target, channeling a loud heartbeat.[3]

References

  1. My Hero Academia Manga and Anime: Chapter 99 and Episode 52.
  2. My Hero Academia Manga and Anime: Chapter 104 and Episode 54.
  3. My Hero Academia Manga: Chapter 208 (p. 8).

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