Regvolt 500 Watt Deluxe Automatic Voltage Converter Transformer &ndash; Step Up & Down Function with Circuit Breaker Protection (ATVR-500 Deluxe Voltage Regulator) Regvolt ATVR-500 110/120 to 220/240 or 220/240 to 110/120 Step UP and Down Voltage transformer and Automatic Voltage Regulator Digital display meters are more accurate stable and easy to read the voltage status at a glance. This unit comes with individual switches for both input and output voltage which ensures double protection This unit has a built-in new generation CPU which ensures consistency and stability to the AVR unit 500 Watt Max Load Capacity. Single Phase. Input/Output frequency 50Hz. Great for electronics and refrigeration appliances.