The Fluke Networks Versiv Mainframe is a versatile cable tester designed for use with the DSX-5000 and DSX-8000 models. Made by the trusted brand Fluke Networks in the United States, this unit can test RJ45 cables with ease. The Versiv Mainframe provides accurate and efficient testing capabilities for professionals in the business and industrial sectors. Plus, with free shipping included, it's a convenient and cost-effective solution for ensuring the quality of your cables.