A digital multifunction meter is an electronic device that is used to measure and display multiple aspects of an electrical system. It is typically used to measure current, voltage, power, energy, frequency, and other parameters of AC and DC circuits. The meter is used in a variety of applications, such as monitoring energy consumption in buildings and industrial plants, testing circuits in electronic equipment, and measuring the output of solar photovoltaic systems. The meter can also be used for troubleshooting and diagnosing electrical problems.