Definitions for "Operating frequency"
The RF (radio frequency) search coil-transmitted and received frequency that the metal detector is designed to operate at.
The nominal frequency of the AC component in a transformer or inductor. If the operation requires the frequency to vary, then a range between minimum and maximum is needed to properly design the component.
The actual frequency output with respect to the actual operating conditions of temperature, voltage and load.
the rate at which an electrical current alternates, usually measured in Hertz (Hz).
Keywords:  cycles, capable, maximum, second, off
The maximum number of on/off cycles that the device is capable of in one second.