Buy networking cable wire tracer/tracker – nf801 from almiria techstore. Trace communications and coaxial cables includes connectors for use on lan, telephone, and video cable quickly trace and identify cables among lots of unknown cables. Check continuity of lan cables. Tone track the cables or wires, and diagnose the breakage. Visible indication: pin-to-pin cable map for individual cable (not by pairs). Low voltage alarm function. Earphones permit use in noisy environments. Led light assists use in dark corners