AC-series pilot droids were humanoid in shape, versus the three-armed, cylinder bodied RX-Series—another brand of pilot droids used by Star Tours. The AC head was helmet-shaped and flattened on the front side, with a round speaker and a pair of yellowphotoreceptors. They were equipped with a breakthrough Intellidor 8droid brain, advanced articulations, a set of DV 24 robotic hands and a disc-shaped power recharge socket on the torso.[1]