This instrument is designed to identify and trace wires or cables without damaging the insulation. It can be used to check for short circuits, locate open circuits, and test cable continuity. The device also helps identify the status of telephone lines, facilitating installation, debugging, and maintenance. The kit includes a Sender and a Receiver. Features: - Test the continuity of cables or wires - Trace cables or wires and diagnose breaks - Identify the status of active telephone lines - Transmit a single or alternating tone across cables and receive the signal using a tone probe - Adjustable audio volume on tone probe - Includes RJ11 jack for telephone connections and alligator clips for wire connections - Compatible with common tracing tone sources - Easy cable connection via RJ-45 jack, patch cord, or alligator clips - Durable design for long-term use Specifications: - Test phone line polarity - Trace individual wires - Locate wires hidden behind drywall - Detect cable interruptions - Find breaks in cables - Power: 9V battery (not included) Package Included: - 1 x Cable Emitter (battery not included) - 1 x Cable Receiver (battery not included) - 1 x RJ11 Cable - 1 x RJ45 Cable - 1 x Instruction Manual