SM-40

The SM-40 is an expensive handheld computer with a built-in cellular modem and extended-life powerpack.

Stoker used an SM-40 to record information on Decepticon activity in Nebraska, including photographs of the Decepticon command bunker and its interior. His SM-40 was subsequently stolen by Verity Carlo, whereupon it fell into the hands of Ratchet.

Nightbeat later found it had been extensively modified by the Machination and was being used to track Ark-19.

From Teletraan I: The Transformers Wiki, a Wikia wiki.