The Garrett Goldmaster 24K is a high-frequency induction-balance gold nugget detector. It offers powerful performance on tiny gold nuggets with its advanced features and 48 kHz operating frequency. Its XGB Ground Balance system allows the unit to be used in a wide variety of ground conditions with more stable operation and less ground noise. Users can select the 2-tone beep mode to help distinguish target types or the standard VCO zip mode, where audio pitch and volume rise as signal strength increases. The variable SAT (self-adjusting threshold) speed control allows the user to adjust the threshold recovery speed to help reduce the effects of changing ground mineralization.