GARRETT AT GOLD METAL DETECTOR W/EDGE DIGGER CAMO POUCH BOOK & INSTRUCTION DVD by MDS-ATGOLD-DIGGER-CAMO True All Metal Mode detection. The All Metal Mode is preferred for prospecting because it provides the greatest possible depth and sensitivity. Garrett Exclusive All Metal Iron Audio feature. This function allows the introduction of a Low-Tone response to audibly indicate ferrous targets and it is fully functional while remaining in a True All Metal Mode! With the AT Gold, it is no longer necessary to sacrifice depth and sensitivity by switching into a Discrim Mode to check iron targets. Iron Audio is also available in the two Discrim Modes. Garrett Exclusive Adjustable Ground Balance Window feature. This function allows the user to spread the ground balance setting in order to simultaneously ground balance to a range of values. This smooths out the audio by reducing subtle ground responses and allows the user to hear those faint targets. This feature can even be used to reduce the response to some hot rocks and terra cotta. Higher FrequencyThe AT Golds 18 kHz frequency is optimized to detect tiny gold pieces. It is also very sensitive on gold jewelry, lead relics, and on small bronze, copper, silver and brass items. Two Discrimination ModesThe AT Golds two Discrim Modes offer the additional audio features of multiple Tone ID and Tone Roll Audio to provide more target information. Ground BalanceAutomatic and manually adjustable for improved performance. High Resolution Iron DiscriminationProvides 40 points of iron resolution for the most precise ability to separate a good target from iron trash.