Klein Tools VDV501-851 Ethernet Pro 3 Tester and Locator Remote Kit is a professional cable testing solution developed for testing, verifying, and locating voice, data, and video cable installations. It helps detect wiring faults such as open circuits, short circuits, miswires, and split pairs on RJ11/RJ12 telephone cables, RJ45 Ethernet/data cables, and F-connector coaxial cables. Capable of measuring cable lengths up to 2000 ft / 610 m, the device clearly displays cable length, wiremap, cable ID information, and test results on its backlit LCD screen. With Power over Ethernet (PoE) detection and testing, hub blink mode, and multiple tone generator support, it simplifies installation, maintenance, and troubleshooting in network, data, telephone, and coaxial cable lines. The included self-storing Test + Map™ remote, 5 RJ45 locator remotes, and 5 F-coaxial locator remotes allow multiple cable runs to be quickly and accurately identified. Compatible with common cable types such as CAT3, CAT5e, CAT6, CAT6A, CAT7, RG59, and RG6/6Q, the Klein Tools VDV501-851 is a reliable, practical, and comprehensive test kit for electricians, network technicians, low-voltage specialists, maintenance teams, and field installation personnel.