... .5%. voltage regulator with LED display(new design)·Single Phase, Servo type voltage stabilizers ·Adopting the double sampling, double stabilizing voltage, and the advanced electronic automatic controller ... ·Protection for time-delay, over-voltage, low voltage etc. ·Option for Digital Display / LCD Display LCD display, digital displayModel:SMR-500VA 1000VA 1500VA 2000VA 3000VA 5000VAInput ...