A power strip, with indents on the outside plastic to fit a grounding prong so you can plug in grounded plugs into the ungrounded power strip
https://files.bitbang.social/media_attachments/files/110/851/776/245/413/217/original/516b9aa4fffc01c9.jpeg
Bouns Round: This power strip, made by a reputable Japanese company, sold at brick and mortar electronics stores, and with PSE (product safety electrical) marking
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