1000 Watt Max Load Capacity. Great for use with electronics and refrigeration appliances. Norstar DAVR-1000 110/120 to 220/240 or 220/240 to 110/120 Step UP and Down Voltage transformer and Automatic Voltage Regulator . …Single Phase. Input/Output frequency 50Hz. - Digital display meters are more accurate stable and easy to read the voltage status at a glance. - this unit comes with individual circuit breakers for both input and output voltage along with dual switches which ensures double protection. - This unit has a built-in new generation CPU which ensures consistency and stability to the AVR unit.