Features This is a versatile wire tracker for phones, network cables, power cables, and more. Breakpoints can be easily and quickly located without opening the wire cover. Integrated wiring network engineering and building monitoring line maintenance. Equipped with RJ11 and RJ45 cables with connectors on the transmitter. Short circuit/open circuit detection and DC level test function, a good tool for telecommunication engineering, Internet cafes, network maintenance, etc. Features:  -This is a versatile wire tracker for phones, network cables, power cables, and more. -Breakpoints can be easily and quickly located without opening the wire cover. -Integrated wiring network engineering and building monitoring line maintenance. -Equipped with RJ11 and RJ45 cables with connectors on the transmitter. -Short circuit/open circuit detection and DC level test function, a good tool for telecommunication engineering, Internet cafes, network maintenance, etc. Specifications: Item Name: Wire Tracker Brand: MESTEK Model: WT58D Working Environment: 0℃ - 40℃, 20%-75%RH Storage Environment: -10℃ - 50℃, 10%-90%RH Altitude: ≤2000 meters Distance of Sending Signal: 0-300m Battery: 2x9V 6F22 (NotIncluded) Receiver: 190mm x 40mm x 23mm/7.48" x 1.57" x 0.91" (Approx.) Launcher: 140mm x 60mm x 25mm/5.51" x 2.36" x 0.98" (Approx.) Package list: 1 * Receiver 1 * Transmitter 1 * RJ11 Connecting Cable 1 * RJ45 Connecting Cable 1 * User Manual 1 * Line Finder Bag 1 * Pair of Earphones Package List