Compact holographic image projector, worn by an alien race who infiltrate Stargate Command by masquerading as captured human personnel, in third season episode Foothold. Seen again in sixth season episode Smoke and Mirrors, when rogue NID agents use one to frame O'Neill for murder.
Painted resin, with a rapidly cycling arc of blue LEDs and a center pulsing orange LED, powered externally.
From Propworx.
