An electrical (not fiber optic) TTL strobe converter for Fujifilm cameras that provides through-the-lens flash metering so the camera automatically controls strobe output. It uses an Ikelite ICS-5 bulkhead connector, is waterproof to 330 feet, and switches between TTL and manual modes by button, supporting flash exposure compensation and rear-curtain sync. It requires a compatible TTL hotshoe and weighs about 6 oz. The page indicates this item is out of production with no remaining inventory.