Electronics power ratings and the IEC C13 (For varying international power sources)
100-240V means "universal"

What you're looking at here is what's called a universal input -- it can accept 100V at either 50 or 60Hz (Japanese power), 120V at 60Hz (US single phase power), 240V at 60Hz (US NEMA 6, Philippines, ...), 240V at 50 Hz (European/IEC), or even 208V at 60Hz (US "wild leg" or sometimes phase-to-phase as well).

So, just get the appropriate kettle lead for the country in question and plug 'er in, no converter needed!