An anti-eavesdropping hands-free headset/muzzle that looks like Bane's mask and changes your voice to Vader's

https://www.youtube.com/watch?v=w2wF8LOV5kw

Hushme is an electronic muzzle that you strap around your face, talking into its built-in mic in order to prevent people from eavesdropping on your calls; you can also use it to change your voice so you sound like a howler monkey or Darth Vader. If this isn't a hoax, its so deep into Poe's Law territory that it might as well be one.