A Multimeter is a valueable tool for any electronic enthusiast.

In general it has the following functionality:

Voltage Measurement

Current Measurement

Resistance Measurement

Diode Test Functionality / Continuity Testing.

They come in various sizes and types.

The older models are Analog and have a moving needle display.

New Models are generally digital.

A Multimeter should generally is the first piece of test equipment

that the electronic enthusiast purchases.