I use a Garrett Grand Master Hunter CXIII Most of the time its running great, it depends on the strength of the batteries, but every once in a while this detector can be full blown retarded, false signals every where you turn, for me it works best in wet to moist soil, completely bone dry is so-so, in gravel you have to swing very slowly, or you will get false signals Thank you for reading and Good Luck on your MDing endevers.