PG144A is a multi-purpose tool designed for professional power generation and protection applications. It is a handheld device capable of measuring, displaying, and recording measurements from a variety of sources. It is a single-mode, three-wire device which is capable of measuring AC/DC Voltage, Current, Frequency, and Power Factor. It also comes with a variety of features such as harmonics analysis, overload monitoring, low voltage alarm, user-defined window, password protection, and digital input/output.