This innovative item was created by me for a global art contest, called "The BLUE HUNTER Art Contest" . I submited it for the Hunter Item Category and it was nominateed for the final round (23 entries were selected out of 711, in my category had 4 entries. ). The award ceremony was held in Tokyo, where japanese voice actresses introduced and talked about my submission.
You can find more about Sound-Stinger :
https://manga.uminohi.jp/en/art/