The Keysight Technologies 34420A is a high-performance digital multimeter that offers a wide range of features and capabilities. It is designed for use in a variety of applications, including research and development, manufacturing, and quality control. The 34420A features a 6.5-digit display, a resolution of 10 nV, and a basic accuracy of 0.0025%. It also offers a wide range of measurement functions, including DC and AC voltage, DC and AC current, resistance, capacitance, and frequency. The 34420A is a versatile and powerful digital multimeter that is ideal for a variety of applications.