[High Quality] The tone generator kit is made of high-quality materials, wear-resistant, corrosion-resistant, lightweight, and easy to carry. The gain is normally 30dB, with a nominal input impedance of 100M Ohm and a 200EP inductive amplifier. Note: The wire tracker requires two 9V batteries (NOT INCLUDED). [Safety and Widely Used] The 200EP tone generator and probe kit is widely used in cable and wire maintenance. Applications include line tracking, short circuit testing, and clear/busy/ringing identification. The insulated probe and built-in loudspeaker help prevent conductor short circuits, making the network toner and probe kit safer to use—an essential tool for electricians. [Multi-function and Professional] When used with any tone generator, the professional wire toner probe kit features adjustable volume for identifying and tracking wires or cables within a group without damaging insulation. For non-terminated cables, the clamping method allows direct measurement, suitable for telephone and network line applications. [Accurate and Easy] The wire toner tracer has a spring-loaded ON/OFF button for easy operation. Same-group cable tracking is detected in just 1 second. With optional continuous or adjustable signal output, the process is simple and results are accurate. Includes an instruction manual that is detailed and easy to understand. Comes with a carrying bag for convenient storage and transport, helping protect the device and extend its lifespan. Material: Plastic Color: As shown Package Contents: 1 x Tone Generator Kit (Only the above items are included; other products not included) Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement tolerance is +/- 1-3 cm.