Both of the testers haven’t been tested so I’m not sure if they work.

The Independent Test-All IV Premises Distribution System (PDS) Cable Tester Set Of 2 is a high-quality cable testing tool from Independent Technologies, designed for efficient and precise testing of cable systems. Made in the United States, this set includes two cable testers that are perfect for ensuring the functionality and reliability of your cable network. The Test-All IV model offers advanced testing capabilities, making it a valuable asset for professionals in the business and industrial sectors who rely on accurate cable testing and inspection services.