Goa'uld cloaking device

A Goa'uld cloaking device was a device used by the Goa'uld to become invisible to Human perception. Nirrti experimented with phase shifting technology in an attempt to better fight the Re'tu, but the SGC recovered her device when she followed SG-1 through the Stargate. Anubis later gave one of his Ashraks a cloaking device, and used it to go on a killing spree at the Alpha Site.