These were small rings that were around the middle finger of the left hand. A simple wave over the device activated it with a red light shining on its surface indicating its use. A further wave seemed to designate target coordinates. (SG1: "Demons") The ring itself transmitted data to an Aerial Zat'nik'tel Platform which was hovering above the planet and created a bolt of electricity that slammed at a targeted location. Those near the discharge were rendered unconscious with the energy being described as someone being stunned by a Zat'nik'tel. (SG1: "The DVD Collection 17")