Quis custodiet ipsos custodes?

Image Source: http://www.carolwrightgifts.com/wireless-headphones_39249_zoom1.jpg
Intent: To provide a simple multi-use execution device for the quick and relatively painless death of the worst of galactic society.
Development Thread: N/A
Manufacturer: Defiance Consolidated Multipurpose Manufacturing
Model: Minor
Affiliation: Sith Empire, First Order
Modularity: No
Production: Limited
Material: Composite(frame), programmable foam(earpieces), silicon(electronics)
Strengths: Kills quickly and painlessly
Weaknesses: Will not work for non-humanoid creatures, can be easily removed or shaken off if the
Description: The Emeritus Sonic Execution Device is a simple machine, similar to a pair of headphones. Placed over the ears of a humanoid, the device is timed as the memory foam forms a perfect seal around their ears. Upon the timer reaching its end, a tremendous burst of sonic noise is forced into their cranium, powerful enough to almost instantly liquefy their cerebral matter, reducing it into a grey sludge that will pour out the nasal cavities and mouth of the freshly deceased individual.
Being an execution device that requires a degree of extreme precision, the prisoner to be executed must be fully restrained. Excessive shaking of the head or free motion of the arms/legs/other appendages could allow for its easy removal - the device is only as firmly attached to the head of the prisoner as the executioner makes it. As well, this device will not work on non-humanoids, or entities whose ears it cannot fully cover. Any seeping of sound will cause depressurization of the device, and it'll only make a really loud noise.
Special licensing and proof of employment in faction's prison system that approves the death penalty is needed before purchasing this.
Original Section(s):
New Section(s):
Manufacturer: Emeritus Industries
Affiliation: Open Market
New Section(s):
Manufacturer: Defiance Consolidated Multipurpose Manufacturing
Affiliation: Sith Empire, First Order