A Frequency Counter Meter is an electronic device used to measure the frequency of an input signal. It is commonly used in various applications such as telecommunications, electronics, RF testing, and audio equipment. This typically support various input types such as square wave, sine wave, or pulse signals. The sensitivity of the frequency counter determines the minimum signal strength it can detect reliably. These counters offer additional measurement features such as duty cycle measurement, pulse width measurement, or period measurement. Frequency Counter Meter is available in a wide range of frequency capabilities, from a few hertz (Hz) to several gigahertz (GHz).