But even with an adapter you risk an electrical fire or blowing up the device. You need an active step up or step down converter. My mum always buys cheap electrical stuff from SE Asia off eBay. She gave us a kitchen appliance like that, it’s rated for 110v and doesn’t have a switching power supply. Even using the supplied adapter we’d be smashing it with 240v from the wall. So it went on the trash heap. A step down converter is ridiculously impractical to use around the house.