This strange Beauty Voice Trainer gadget from Japantrendshop supposedly helps maximize your singing voice by re-positioning the tongue and opening the voice passage, “allowing [for] a much stronger sound.” Product page.
Secondly, it helps with abdominal breathing, a necessity for proper singing. Finally, the included tuning fork guides you to the notes you want, and trains you to hear the proper intervals between pitches.
[via Japantrendshop]