We generally take for granted that our line voltage is steady as a rock. You would be surprised how far from the truth this can be. Sensitive electronics equipment requires stabilized line voltage. This series of line voltage stabilizers can take inputs of 75VAC to 130VAC or 180VAC to 260VAC and deliver either 110VAC or 220VAC stabilized at + or - 4%. 50Hz or 60Hz is acceptable. All are metered for constant monitoring of the output voltage. Especially useful in rural areas and countries and communities where the line voltage fluctuates. Choose from 13 models covering 100W to 10,000W. ME554.