EV - series supervisor droid The EV - series supervisor droid was a model of supervisor droid manufactured by MerenData . Originally designed to be an efficient taskmaster for automated labor pools , the droid series suffered from a number of unfortunate " glitches " and was one of the largest corporate disasters in history . Characteristics . The EV - series was a model of supervisor droid with a rod - thin build and a grating mechanical voice . Bronze - colored droids with polished plastron plating , they were equipped with a heuristic processor and an advanced personality matrix . In addition to Basic and binary , a new EV could speak 3 unassigned languages . Their heads featured an auditory receptor , a broadband broadcast antenna / receiver system , its logic center , a pair of golden Human - range photorecptors , and a speech mimic flap synchronized with its vocabulator . An EV also had an internal high - frequency binary comlink and its cervical servomotor was located in its chest . Their power axis contained a recharge coupling access port and was attached to the droid ' s pelvic mount , which could lock into legs or a motorized cart . When equipped with legs , they stood 1 . 9 meters tall . They also had a pair of manipulator arms tipped with hand appendages . During production , the standard EV motivator originally planned for the EV was accidentally swapped with the MDF motivator , a contraband piece of hardware designed for use in torture droids . While the droids with the swapped motivators actually outperformed the unaltered droids when it came to managing the droids under their care and worker motivation , they used sadistic methods to accomplish their tasks . EV - series supervisor droids could be modified to perform different functions . Many military units swore by the use of an EV unit as a quartermaster for supplies thanks to its meticulous skill at keeping supplies protected and in good working condition . This relativity simple modification process was started by installing a video recorder the droid could use to keep a visual catalog of supplies and to track missing items . A power charged was then installed in the droid ' s torso so it could keep power pack s fully charged . Finally , the EV was given a datapad with access to the military unit ' s inventory . They could also be used as technicians . Although this modification may have seemed unlikely for a supervisor droid , EV units had a working knowledge of how machines functioned and could be quite adept at fixing them . This modification emphasized the droid ' s ability to make repairs and adjustments to machines and other droids or cybernetic beings . It included removing the EV unit ' s internal comlink and , in its place , installing a diagnostics package to help it find and fix problems . It also entailed equipping the droid with a tool kit and a roll of mesh tape for emergency repairs . Optionally , one of the EV unit ' s hand appendages could be swapped out for a tool appendage wit a multifunction apparatus , giving it the ability to connect up to three tools needed to perform a particular job . Finally , a targeting scope was added to the droid ' s head and calibrating it , which required 15 minutes of work . History . Unknown to the consumer base , these glitches were created by the company accidentally installing an MDF motivator . Normally , this would not be such a horrible catastrophe , except the MDF motivator was the root motivator for a series of illegal torture droids being created for the House of Tagge . Instead of halting production outright , the company adopted a wait - and - see approach . At first , reports showed EV droids not only fulfilling their required tasks , but outperforming any original expectations held by MerenData . Eventually , stories began to filter in to the company of horrible acts being committed by the series . The droids turned out not only to be immoral in their attitude , but to actually enjoy torturing and causing pain : on Eriadu , an EV supervisor droid fused his entire droid worker pool ' s feet to the floor , and on Indu San , an EV set fire to slow workers ' oil baths . On rare occasions , such as on Kadril , an EV droid was known to have Human workers prodded with electroprods . MerenData remedied the problem by introducing a new version of the EV known as the EV - II and recalled the defective units to exhange motivators . While most were brought in and repaired , the manufacturer ' s recall efforts did not reach every EV and some customers preferred the flawed model . MerenData also commissioned the V - series supervisor droid , targeted to the Imperial Military . Unfortunately , both lines failed miserably . Ploovo Two - For - One employed an original EV series droid , as did crimelord Jabba the Hutt . Behind the scenes . Unlike most sources , which identify the EV - series supervisor / interrogator droid as a third - degree droid , the " Arms & Equipment Guide " labels it a fourth - degree droid .