Thank you all. Unfortunately it is already in the US, and I understand that it is very very complicated, also because I should ask an electrician who knows both European and American standards. About the HP and Watts, I attach the manual information about that.
Can someone help me? Is there a way to use my European treadmill (3,5HP, 230V AC, 50/60Hz, 1850 WATT) here in US using a transformer/converter? thank you!