Interociter
An interociter was a device which enabled video communication in real time across universes, and even with dimensional travellers currently travelling the Void.
The Shelterville garage was equipped with an interociter. A mechanic once used it to call Jenny Everywhere and Jenny Anywhere at Greta Överallt's request. (COMIC: 24 Hour Comic 2019)
The Man in Grey was seen using an Interociter to spy on Jenny and Laura for nefarious purposes. (COMIC: Jenny and the Multiverse)
Behind the scenes
The interociter is one letter removed from the interocitor, an iconic multi-purpose science-fiction device from Raymond F. Jones's This Island Earth and its film adaptation. The downard-pointing triangular shape of the interociter's screen matches This Island Earth's interocitors, though there are some differences in the details.