Falcon Gold Tracker MD-20 are designed to find small amounts of gold other detectors miss. The great thing about the gold probes by Falcon are they are able to get into small places other detectors can not! Operating at 300 kHz, the MD20 series is the most sensitive detector on the market. The MD20 has 20% more sensitivity and depth than it's predecessor, the MD10, and more than twice the sensitivity of other manufacturers probes. The Falcon gold probe is a serious gold prospecting tool, not a toy like some metal detectors. If you want to find the gold everyone else is missing, then the Falcon Gold Tracker MD-20 is for you.