It intend and Designed for car maintenancerepair technician to locate the abnormal noise emitting from element of the vehicle at a far higher efficiency far more effectively than ever.High technologies certainly benefit automotive techs and are applied in engine, power wires, and lines.Contents : user guide x1 , earphone x2 test clamp x5, testsensor (with magnetic) x 1 nylone fastening tapes x 5 unit control box x 1, outer case x 1, magnetic testing probe x1 sensor with suction pad x 1.