Due to Radio Shack’s bankruptcy and restructuring, you cannot request a manual from the company directly. However, the manual is preserved in several online archives.
Go to manualslib.com and search for "RadioShack 22-805" . Users have uploaded scanned copies of the original owner’s manual. It includes the schematic diagram, operating instructions, and safety warnings. radio shack 24 range digital multimeter 22-805 manual
Troubleshooting Your Vintage Tech: A Guide to the RadioShack 22-805 Multimeter Due to Radio Shack’s bankruptcy and restructuring, you