There are several communications devices in Bleach:
- mobile phones that receive orders from Soul Society (seen being used by Rukia, Matsumoto).
- There are also other audio communicators (seen being used by Matsumoto, Yumichika during Grimmjow's 1st attack on Karakura Town).
- The tv-like communicator used by Yamamoto to communicate with Hitsugaya's advance team in Karakura Town.
- The Kidou spell Tenteikūra.
- Traditional alarm systems (sliding pieces of wood and hitting wooden panels with a hammer).
- Normal telephones & mobile phones (used by Isshin & Mizuiro as well as various during the Bount arc)