You can google "The Miners Catche" on Cypress St. Redding Calif. (North Calif.) Ask for "Chip" he has over 40 years in the Metal Detector Biz. He sells Fisher and others. Tell him "Don" Sent you, He can answer many questions. Good Luck.HEY IT ME ACE 250 I AM BROWING MY FRIEND GARRET GOUND HOG AND I NEED HELP WITH IT .IT WONT PICK THIS GOLD NUGET THAT IS 2.20 GR IF YOU CAN HELP IT MAKE MY DAY