100w Dual Voltage Transformer Light-weight High Temperature Resistant Ac 110v/120v To 220v/240v Power Converter Adapter - AliExpress
Amazon.com: Yinleader 500W Voltage Transformer Power Converter(110V to 220V,220V to 110V) Step Up/Down Converter 110/120 Volt - 220/240 Volt w/US Power Cord,Circuit Breaker Protection (VTUS-500) : Electronics
VOLT Polska 1000VA 230V/110V konverter - Akku-Elem.hu