TESSAN Flat Plug Extension Cord 5 FT, Surge Protector Power Strip with 4 AC Outlets 1 USB C and 2 USB A Ports, 900 Joules Protection, Multiple Wall Outlet Extender Suitable for Office Dorm, Grey

I've found that the "universal power adaptors" are bulky, don't fit too well on wall plugs (tend to fall off, especially if you add a set of additional cable connections. Instead, I have a set of individual power adaptors - I use this one https://www.amazon.com/Ceptics-Adapter-World-International-Travel/dp/B00E7P7UHK/ - costs about $15 one time. The same link should also show you a bigger set of 12 adaptors that's around $23. I use it with a travel power strip (flat plug, to minimize the bulk / falling out). I use this one https://www.amazon.com/Extension-TESSAN-Protector-Spaced-Outlets/dp/B0BQ17FTKB/ - includes surge protector upto 900J.