VS 500-500 Watts Heavy Duty Voltage Stabilizer with Built in Voltage Transformer 110V/220V for Worldwide Use Converts 110/120 V to 220/240 V OR converts 220/240 V to 110/120 V (switch is on back of unit) Large Range of Stabilization with Over/Low Voltage Protection- +- 5% Safe and Reliable. Analog meter on front of unit shows exact output voltage Voltage stabilizer good for countries with unstable voltage supply Voltage stabilizer good for countries with unstable voltage supply. FUSE PROTECTED.