Generally, a faster sweep will find greater, deeper gold targets, but will usually pass up modest shallow gold. A slower sweep will have a tendency to reduce sensitivity towards the deepest targets, but will discover modest shallow gold a lot easier. The GPZ 7000 is additionally pretty user friendly, even https://www.puffergroup.com/forums/topic/1129/gold-detector-tricks-for-the-modern-prospector/view/post_id/1479