The Recon Droid, commonly known as the Separatist Probe Droid, was a small, grey droid that was used for espionage. They could fly and hide well from enemies. Recon Droids had one main black photoreceptor, with smaller ones around the head. They had red sensors and three antennae on the top. They had five appendages, which gave them the ability to scale tough surfaces with ease, making as little noise as possible. These droids spied out enemies, and transmitted back information on the location. Some were equipped with blasters.
Canon Film Appearances:
-Star Wars: The Clone WarsCanon or Legends?: Canon

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The Guide to CIS Droids
Random(Credits to @-grievousharm for the cover) This book will tell you about all the droids of the Confederacy of Independent Systems (CIS), or more commonly known as the Separatists. Hope you enjoy and learn something. If you don't mind please vote.