Subject line pretty much says it Catalog Brochure about 20 pages with all the comparative specs on the Datron 4000 through 4700 series range calibrators USA postage about $2.50, International $7.50 Contact me direct OFF LIST (manuals@artekManuals.com)..replies to the list will be ignored Dave ArtekManuals.com -- Dave Henderson Manuals@ArtekManuals.com www.Artekmanuals.com PO Box 175 Welch,MN 55089 651-269-4265