![1girl bad_id bad_pixiv_id blush bracelet breasts brown_hair collarbone dildo double_bun doughnut egg_vibrator food highres hitachi_magic_wand idolmaster idolmaster_shiny_colors inverted_nipples irogomi jewelry large_breasts looking_at_viewer macaron navel necklace nipples nude open_mouth pink_background pubic_hair puffy_nipples sitting solo sonoda_chiyoko sweatdrop twintails vibrator rating:q score:33 post #3280506](/cdn_image/preview/c9/8d/c98d41562458eae5d8efa94b96121005.jpg)
An electric massager first released in the 1970's for medical use, it was quickly picked up and utilized as a sex toy. It looks like a strange microphone with a white and/or gray head that vibrates.
Its pixiv tag is 電マ (den-ma), an abbreviation for 電動マッサージ機 (electric massager). Not to be confused with denki anma.