Bounty Hunter Legacy 3500 Metal Detector Whites GMT, Goldmaster, 5900, Bounty Hunter Discovery 3300 and Falcon MD-20, Minelab GP3000, GP3500 , Whites MXT Pro, GMT , Tesoro Sand, I Used to use the UNIprobe headphones with the pulse probe , worked great, maybe then bring in a minelab GP detector looking for bigger hits.
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