The ship was minimally armed, with at least one forward and aft particle cannon, making it comparable in firepower to an NX-class starship, but significantly inferior in power to a Tholian starship. They were also equipped with a transporter system and a cloaking device. This type of vessel was capable of exceeding warp factor 5.
In late 2152, the Enterprise NX-01 encountered one of these ships while trying to salvage a 31st century time travel pod. It was destroyed, along with the cell ships escorting it, by a group of Tholian starships also attempting to claim the craft. (ENT: "Future Tense")