Professor Temple's Multiphasic Obfuscator 6 Cm Round Badge

Professor Temple has created many cunning devices and arcane pieces of artifacture in his long career, but none as mysterious as the Multiphasic Obfuscator. It is so mysterious that he actually blankly refused to tell us what it does. However, we have heard rumours, purportedly from eyewitnesses, that claim that it can make the wearer invisible, or perhaps invulnerable. At least insomething. It's a mystery. Also we're told the waiver you have to sign before you turn it on is just a formality...