[]This tone generator and probe kit is made of high-quality materials, wear-resistant, corrosion-resistant. The gain is normal 30dB, the input impedance is nominal 100M Ohm. Note: the wire tracker needs two 9V batteries(NOT INCLUDED). [Accurate and Easy]With optional continuous or adjustable generator, the is simple and the test results are accurate.One button operation. Clip and trace, 1 second to identify cables. Convenient to carry and storage the tester with carrying bag, and protect it from demage, makes it durable. [Powerful and Professional] When used in conjunction with any tone generator, professional wire toner probe kit with adjustable volume is designed to identify and trace wires or cables within a group without damaging the insulation. For non-terminal cables, clamp mode can be used for direct measurement, as well as for telephone and network line measurement. [Safety in Use]Circuit tester has spring-loaded ON or OFF button adjustable volume sensitivity control recessed terminal ports for handset connection resistive plastic carbon-fiber tip prevents accidental shorts when probing wires. Insulation probe and built-in loudspeaker can effectively avoid short circuits of conductor and to use. [Widely Application]This wire tracker are widely used in the maintenance of cables and wires. The measurement area includes line tracking, short circuit test, clear or busy or ringing identification. Selectable continuous or variable tone generator. colour: as shown Material: plastic Package Contents: 1 x cable detector Kit Only the above package content, other products are not included. Note: Light 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.