"MECO-G" Portable Digital Ammeters, Voltmetrs and frequency meters are designed for AC, DC and True RMS measuremnet. Single Phase Portable Digital Watttmetrs can measure poer in single phase system with Unity Power Factor (P.F = 1.0) and Low Power Factor (P.F = 0.2). These instruments are more rugged, reliable and accurate than analog meters. They are light in weight, compact in size and stylish in design. They do not have any moving parts. Display is bright Red LED's. There is no confusion of anti parallax scale.