Please Note: Two 9V batteries required, batteries are not included, and the probe NOT NEED touching the wire to pick up a tone. Non-contact probe audibly identifies selected wire or cable. Multifunction Wire Locator - You Can Trace Wires in a Range of Wires and Cables Including Network Telephone Line, Coaxial and Verify the Continuity of Your Installation. Find Wires Quickly and Accurately - Flexible usage, thanks to the cont mode you can check for short and open circuits, and the RJ11 connector lets you test telephone International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.