4P/160A Dual Power Automatic Transfer Switch High Quality Insulation Type. Rated impulse withstand voltage: 4kV. 3C rated voltage range: 37V-440V.3.5kg / 127.5oz. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday. This item is in the category "Business & Industrial\Light Equipment & Tools\Transfer Switches". The seller is "autocomponents999" and is located in this country: US. This item can be shipped to United States.