TESSAN European Travel Plug Adapter 2 Pack, PD 20W Adapter for Europe Plug with 4 AC Outlets 4 USB (2 USB C), Type C Adaptor for US to Europe, Italy, Spain, France, Portugal, Greece, Iceland, Germany

We actually take an European Travel Plug Adapter: https://a.co/d/04mc9mYQ because most boats have both US and EU. And a USB brick with many ports. I also make sure to unplug anything when we are out of the room.