General description Portable Telephone Cable Tracker is designed to assess the continuity of cables or wires, follow them to diagnose break points, and receive sound signals on telephone lines. It can identify the status of active telephone lines (idle, ringing, busy) and send either a single continuous tone or a double alternating tone to the cables. This device is ideal for checking the polarity of telephone lines, tracing cables, finding buried cables behind drywall, and detecting breaks in cables. Technical specifications Receiver dimensions: 23 x 4 x 2.3 cm (H x W x D, approx.) Transmitter dimensions: 6.5 x 5.6 x 2.1 cm (H x W x D, approx.) Red and black test lead cable length: approx. 61 cm RJ-11 telephone cable length: approx. 47 cm Power supply: 9V battery (not included) Compatibility and accessories Includes: 1 x Cable Tracker Transmitter 1 x Cable Tracker Receiver 1 x RJ11 Cable 1 x Cable with Alligator Clip