Guess it is legit, this jaw exerciser, seems very perverted though.
https://www.aliexpress.com/item/1005007099436871.html?spm=a2g0o.productlist.main.67.3651V7GqV7GqMA&algo_pvid=d1af7a7f-a480-44cd-b261-26504dac50a2&algo_exp_id=d1af7a7f-a480-44cd-b261-26504dac50a2-33&pdp_npi=4%40dis%21CAD%2111.01%211.99%21%21%2157.22%2110.38%21%402103080917196943781503519ea638%2112000039400943278%21sea%21CA%210%21AB&curPageLogUid=GfGwqLPDfG0Q&utparam-url=scene%3Asearch%7Cquery_from%3A
