1. High accuracy, high stability 2. Low power consumption, easy to use 3. 240x160 LCD, dynamic display, easy to read I. IntroductionDF~300 Handheld Three~phase Meter is high accuracy, high stability, low power consumption, easy to use. Can test the three~phase AC voltage, current, phase between voltage, phase between current, phase between voltage¤t, frequency, phase, active power, reactive power ...