... , easy to use 3. 240x160 LCD, dynamic display, easy to read I. IntroductionDF~300 Handheld Three~phase Meter is high accuracy, high ... -proof, high insulating protective jacket.2. Uses 240×160 LCD, dynamic display, vector diagram indicates, easy to read.3. There are ... (phase error ±5° if current amplitude under 10mA). DF-300 Handheld Three-Phase Meter