Professional Wire Tracker This instrument is a multifunctional portable cable testing tool designed for a wide range of cable types and applications. It is an essential testing device for telecommunications engineering, cable installation, and network maintenance. Wire Tracing Quickly locate specific line pairs among multiple cables. Compatible with RJ45 network cable terminals, RJ11 telephone line terminals, and other metal wires using the included clip adapter. Features a sensitive, stable, and reliable sensor for accurate detection. Wide Application Commonly used in cable and wire maintenance tasks. Supports line tracking, short circuit testing, and identification of clear, busy, or ring signals. Equipped with a tone generator that offers continuous or variable tone selection. An indispensable tool for electricians and technicians. Extra Earphone Included earphone allows precise identification of the target cable in noisy environments by monitoring the strength of the audible tone. Volume control button enables adjustment for optimal sound level, ensuring efficient operation without disturbance.