In the manga, the scouts wear wristwatch-type communication devices which allow them to speak with each other. Two sets appeared throughout the series. The first set appeared in Act 03, Volume 01, and came directly from the Sailor V game. The second set were given to them after Rini's appearance.
In the anime, the communication device is a small, flat, computer-like object that is used by the scouts in the first season in order to communicate with each other. This item first appears in episode 017.
In episode 62 of the R season, the Scouts received new communicators along with their Star Power Sticks. These new communicators resembled wrist watches, and the face resembled Sailor Moon's Crystal Star. In the S season, Sailor Uranus and Sailor Neptune also had similar communicators.
Pretty Guardians Sailor MoonEdit
In Pretty Guardian Sailor Moon, the scouts use regular cell phones as communication devices. These are known as "Teletia S" and first appear in Act 01. The scouts could also use these cell phones to disguise themselves. By taking a picture of any person, the scouts could disguise themselves to look exactly like that person. For easier use, the picture taken could be used right away or later.