Item Type: Network Cable Tester Material: ABS BNC Terminator: 25 Ohm/50 Ohm.. Indication Maximum Cable Length: 1000ft Open Short Circuit Test Power Supply: 9V Alkaline Battery (Shipped Without Battery) Application: The 4 in 1 multifunction tester is a multifunction network tester that integrates 4 functions, which can test telephone lines, network cables, USB cables, and BNC cables,and can quickly connect open circuits, short circuits, and reverse connections. test. By using the attached remote terminator (the tester), the cable can be easily tested before and after the cable is installed, easy to use and powerful, which is now an indispensable professional tool for engineers, professional maintainers, and inspectors.