The usage of ensure vs. insure is very important from a contractual perspective, while they sound very similar they can have very different meanings in a legal context. Insure means to safeguard against loss or damage, typically through the ... Read more
Electrical sockets (outlets) in the People's Republic of China usually supply electricity at between 220 and 240 volts AC. If you're plugging in an appliance that was built for 220-240 volt electrical input, or an appliance that is compatible with multiple voltages, then an adapter is all you need.
First of all, the mains voltage is different in Europe and US. In the US, typical mains voltage is 120 V. In Europe, on the other hand, the voltage is typically 230 V. Also, while the mains frequency in Europe is typically 50 Hz, in the US it is 60 Hz. Most devices donât care about the mains frequency.