BSIDE FWT81 Cable Tracker RJ45 RJ11 Telephone Wire Network LAN TV Electric Line Finder Tester With AVD06 Dual Mode Non-contact Voltage Detector AC 12-1000V Auto/Manual NCV Tester Live Wire Check Sensitivity Adjustable This BSIDE FWT81 wire tracker is anti-interference enhancement edition. It is a multi-functional handheld cable testing tool. It has a wide application with reinforced cable types and multiple functions. It is a necessary testing tool for telecommunication engineering, wiring engineering, and network maintenance.