1, there are strict requirements of 110V/60Hz equipment, can not be directly plugged into the 220V/50Hz power supply to use, if directly plugged into the power will lead to burn appliances. At this time you can buy a power suitable automatic AC voltage regulator, using 110V power supply. Or make a suitable power step-down transformer, specializing in its power supply.
2, for a wide range of input voltage switching power supply, the input voltage of 80V to 230V, you can directly use the 220V mains, you need to read the manual carefully, and to ask friends who know how to help determine, in order to put into use.