"MECO-G" Portable Digital Wattmeters can measure power in single phase systems with Unity Powerfactor (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.