@dasman66 As others have mentioned, a lot of devices with smps power supplies can typically handle 220V and just need a plug adapter rather than power transformer. Look on the chargers themselves and find the fine print, there's usually an input and output section. If the input says 110-120V 60Hz, then you need to get a transformer. If the input says 110-220V 50-60Hz, then you're fine A lot of things like phones chargers are just usb which then isn't terribly relevant in this conversation unless you also need the little plug adapters too, but see paragraph above. If the Mac is powered by usb-c, I would say get a single GAN charging squid, something like this: https://www.amazon.com/Charger-Hyphen-X-Charging-Laptops-Compatible/dp/B08X42DRMR/ and as long as you have the right plug adapter then you're fine.