Equipment Products Brochure.
https://www.gfps.com/content/dam/gfps/nz/brochures-and-flyers/gfps-nz-brochure-schonstedt-locators-en.pdf
https://www.radiodetection.com/sites/default/files/product-downloads/magnetic-metal-locators-sales-sheet.pdf?_buster=x3Il9thA
Magnetic Locators Equipment Reviews