Wire tracing Trace RJ11, RJ45, cables or other metal wire (via adapter).Easy and fast to locate the breakpoint without opening the cover of wire Network cable collation: short-circuits, breaking circuit, open circuit and crossing Test line level, positive and negative polarity Status of telephone line checking: test the working status of telephone line (idle, ringing, and off-hook) and TIP and RING line Check wire continuity FWT11 RJ45 RJ11 Telephone Wire Line Finder Tracker This instrument is a multifunctional handheld cable testing tool.Work perfect when RJ11 RJ45 cable is on power.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 person General Technical Parameters Operating temperature: 0 - 40 degrees Celsius, 80 percent relative humidity (non-condensing) Storage temperature: -10 - 50 degrees Celsius, 80 percent relative humidity (non-condensing) Altitude: less than 2000m Anti-explosion rating: IP40 Distance of emitting signal: 300m or so Emitter battery: 6F22 / 9V (not included).Receiver battery: 6F22 / 9V (not included) Model: FWT11 Type: Measuring instruments Primary functions: Wire Line Finder Tracker Scope of application: Education, Home appliance, Industrial, Market, Office, Supermarket Colour:blue Material:ABS Package Contents: 1 x FWT11 Transmitter 1 x FWT11 Receiver 1 x Clip Adapter Cable 1 x RJ45 Adapter Cable 1 x Chinese and English manual Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.