This Multipurpose Network Cable hunts & detects line error,shows how far is the open/short circuit and measures cable length. It has main tester,receiver and remote identifier.This ergonomic instrument is ideal for testing communication lines , integrated wiring , line weak systems installation, maintenance , engineering and technical personnel of utility. widely used in the telephone system,computer network and other metal wire lines and other fields. Features: One person enough to complete cable continuity check Directly hunt 5E, 6E , telephone , coaxial , USB and other cables Check wire errors such as open , short , jumper wire , reverse connection or cross-talk interference Determine the distance of open and short circuit Legth measurement : twisted-pair , phone line , coax and wires Portable unit with long battery life (wait-case