Prang Headphones

"Due to their simple design and easy to reproduce nature, these headphones will not be contained nor classified under any circumstances. We know they are from aliens, this does not make them special or insanely advanced. The principles and technologies are known to us. Please do not claim any falsehoods about them or any other piece of technology we will not them."
-Memo that was passed around several intelligence agencies, dated June 12, 1982

Utility

It was discovered as a means to suppress or deflect radio waves. A thin sheet of aluminum is in the earpiece while a little mechanism jams the radio.

Manufacturing

It similar to the process of the average 21st century headphones. How it differs is the buds contain a piece of tech that provides electromagnetic shielding.

Inventor(s)

Developed by the Prangs

Access & Availability

Commonplace items

Complexity

Has the same complexity as headphones. The difference being they can block or muffle radio waves and transmission.

Discovery

Developed after the Etherian invasion using scientific noted from Glacians and Prang. After the invasion, reconciliation was made and the king obtained the knowledge to produce the headphones and commissioned their development.