Originally Posted by
lhrsfo
I am amazed that any consumer product is sold nowadays that isn't dual voltage - it costs next to nothing to add, whereas having to have separate versions would be far more expensive for a manufacturer.
That's true for electronic devices that don't have heaters or certain types of motors. A heating device needs either a manual switch or an electronic switching system. The first solution is cheap but leaves the device vulnerable to misconfiguration that could destroy it. The second solution would be expensive. I've never seen it implemented.