Mars Goliath 15” DD Waterproof Coil for Minelab X-Terra 3 kHz Detector metal-detectors Iron Audio (Fe Vol) :

Iron Audio (Fe Vol) : Turns Off or Adjusts the Volume of the Low Iron Tone

Minelab GPX 4000

The tumbling stones come in either red or blue

Operation frequency: 2

These agitator knobs move through the material in rapid succession causing it to mix and tumble

Mars Goliath 15” DD Waterproof Coil for Minelab X-Terra 3 kHz Detector metal-detectors Iron Audio (Fe Vol) :Mars Goliath 15" DD Search Coil with Nut & Bolt, Coil Cover, 2 Rubber Rings, and a Two Year Warranty. The Mars Goliath coil will ensure the maximum possible target detection depth as well as a larger scan area. It is at its most efficient searching in large open areas clear of thick vegetation. Compatible with the Minelab X Terra 505 & X Terra 705 Metal Detectors. The Mars Goliath coil will ensure the maximum possible target detection depth as well as