The Mageti is an Altrusian artifact that can be used to open or "fix" (locate) Dimensional gateways that allow travel in time and space. It has its own built-in power source, as well as a telepathic amplifier for defensive purposes.
In the Original Series, Season 1, Episode 6: "The Stranger", the Marshalls and Enik are able to use it to project telepathic force at each other. However, the Mageti also contains a self-destruct mechanism such that attempting to use its defensive capability with excess aggression, for example to take it by force, will cause it to self-destruct. Enik also has a separate device, an amulet , that has similar "divining rod" properties for opening and fixing dimensional gateways, although it requires an external power source.