Description:
Maximum power capacity：4000W
Dimensions：15.75in*9.84in*8.46in
G.W：13.5kg

To convert 110 volts to 220 volts:

Make sure the appliance to be plugged in uses fewer watts than the transformer's rating.
Insert the voltage tap plug (located on the rear of the transformer) into the pair of holes marked "110".
Plug the transformer's power cord into a source of 110 volts.
220 volts will be available at the front panel outlet marked "220" volts when the power switch is turned on.

To convert 220 volts to 110 volts:

Make sure the appliance to be plugged in uses fewer watts than the transformer's rating.
Insert the voltage tap plug (located on the rear of the transformer) into the pair of holes corresponding to the local voltage standard . Check carefully to be sure no error has been made.

Note：
For safety, it's recommended by the manufacturer that the voltage transformer's maximum power should be equal or greater than the power rating of your appliance multiplied by 2.5. For example, if you have an appliance rated at 100 watts, you will need to pick a transformer with a maximum power of 250 watts or greater.
The power of our transformer must be 2.5 times larger than the buyer's appliance to be used normally.