I bought a paid of Wahl Senior hair clippers from the US and I figured all I'd need was a step down transformer (240v to 110v) for it to work and boy was I mistaken! Apparently you need to also take into account the frequency of the current. To cut the long story short, all my early search for a solution was leading me to overpriced "kits" on ebay and the likes. All you have to do is type "frequency 60hz clippers" to…
There is not much good technical SEO info out there for developers to find. It is frustrating for someone used to being able to find documentation/best practices easily.
This is stuff that I have picked up working with SEO people. Not guaranteed to be 100% accurate but hopefully it helps.