The Kanohi Suletu was the Kanohi Mask of Telepathy. It gave its user the ability to read thoughts and to project them.
The Kanohi Suletu was the Great Mask of Telepathy. Toa Krakua was able to use the mask to stay one step ahead of his enemies by reading their thoughts.
The Kanohi Suletu was the Mask of Telepathy. It allowed its user to read the thoughts of others or project his own. Toa Inika Kongu had to deal with a very serious problem – he had not figured out how to turn his mask power off.
When Kongu wore the Suletu as a Toa Inika, the mask's telepathic powers could not be turned off, and Kongu spent the entire adventure on Voya Nui having to hear the thoughts of everyone around him.
Kongu's Suletu was likely the standard appearance for a Suletu that was organic.
A Suletu could not detect mental activity from an Iden user's projection.
The Suletu could fill a target's head with mental "noise".
The Suletu's mental noise wouldn't prevent a target from physically hearing, but would prevent them from concentrating.
The Suletu could be used to convey messages.
The Suletu was no more difficult to use on smarter beings.
It was possible for a being to shield himself from the powers of the Suletu.
The Suletu could not be used to control someone else's mind or body.
The Suletu was likely made using disks other than those found in Metru Nui.