If your electrical power is 50W-250W ----- please choose 500W transformer
If your electrical power is 250W-500W -----please choose a 1000W transformer
If your electrical power is 500W-750W ----- please choose 1500W transformer
If your electrical power is 750W-1000W ----- please choose 2000W transformer
If your electrical power is 1000W-1500W ----- please choose 3000W transformer
A brand-new, unused, unopened, undamaged item in its original packaging
Type: Electronic transformer Features 
2: Conversion of voltage from 220v to 110v
MPN: 220V to 110V Step Down Voltage Features 
3: Voltage Conversion
Output Voltage: AC100-120V 
4: Electronic transformer
5: Bidirectional electricity converter
Input Voltage: AC220-240V Input frequency: 50-60Hz