Monilon Wire Tracker Kit is a multi-functional held cable test tool. There a headphone port on the piece of land side of the receiver. You can earphone -LRB- excluded -RRB- to the headset jack of receiver in places with forte noise. There 9 LED lights to indicated wiring connection on both distant and defeat unit. This function is of quickly finding the required line pairs among many ones. : Wire tracing Trace RJ11, RJ45, cable or former metal wire -LRB- via adapter -RRB- Easy and fasting to locate the breakpoint without opening the wire 's cover. Network cable : Judge short-circuit, breaking circuit, yield circuit and crossing. Test line, favorable and veto polarity. of telephone line checking : Test the working status of telephone line -LRB- unemployed, ringing, and off-hook -RRB- and judge TIP and RING line. wire continuity. General Technical : Operating temperature : 0 - 40 degrees Celsius, outside 80 percent congenator humidity -LRB- non-condensing -RRB- Storage temperature : -10 - 50 degrees Celsius, outside 80 percent congenator humidity -LRB- non-condensing -RRB- Altitude : less than 2000m Anti-explosion rating : IP40 Distance of emitting signal : 300m or so Safety class : IEC61010 - 1600v CAT ? ., pollution ?. Product : Brand Name : Monilon Product Name : Network Wire Tracker Material : ABS Color : blue devil Package content : 1 x Emitter 1 x Receiver 1 x RJ45 Adapter Cable 1 x RJ11 Adapter Cable 1 x User drill .