A multimeter combines in one unit several measurement functions such as voltage, current and resistance. Digital multimeters (DMMs) are generally more accurate and easier to read than their analog counterparts. While analog multimeters indicate the value with a needle over a scale, a digital multimeter has an LED or LCD display. A digital multimeter can be a hand-held device for field work or a bench instrument which can measure to a very high degree of accuracy. DMMs offer a variety of measurements. Most include the basic measurements of current (DC and AC), voltage (DC and AC), and resistance. Additional measurements offered by most DMMs include capacitance, temperature, frequency, transistor test, and continuity.
Test equipment support and enhance the performance of test instruments. A wide range of test equipment accessories are available, including clips, connectors, leads, and probes, as well as instrument holsters and cases, fuses, and power cords and adapters.