Sperry Instruments ET64220 Lan WireTracker Tone and Probe Wire Tracer, Identifies Coax, CAT 5, Speaker, Phone, any Non-Energized Wire

Adaptor plugs include: RJ-45, RJ-11, coax, automotive fuse blade and insulated clamps Audible and visual indication Adjustable sensitivity and positively identifies a single wire when multiple wires are routed in close proximity Operates from (2) AAA batteries for the transmitter and (4) LR44 batteries for the receiver (included) Features an auto-shutoff after 45 minutes. Features an auto-shutoff after 45 minutes.