This series of products are mainly designed to scan and locate cable, such as RJ11, RJ45, BNC cables. and also underground wire locator is mainly to detect invisual wires like at underground or in the wall. a) Easy to track with complete AC Interference Rejection .b)tone trace live cable within 220V with socket avoiding burnout.c) Signal sensitivity adjustable 0-5 feet. Widely applied in irrigation, dog fence. and the tone generator probe kit is mainly for Installation and maintenance of weak current system, communication line, comprehensive wiring circuit, telephone system, computer network, other metal wire circuit etc.