Features: *High-Quality Material: This product is made of high-quality material, which is wear-resistant and durable, not easy to break, and can be used for a long time. *Multi-functional design: This cable tracking tester can determine whether the cable line is continuous, track the cable line, and identify the locations of the line break, etc. *Dual-port test: Quickly detect the crimping condition of the crystals head. It can also be used as a LAN-tester, or it can receive the audios signal in the cable line (telephones line) to determine the status of the working telephones line (idle, ringing, off-hook) )wait. *Easy to carry: This cable tracking tester is equipped with a storage bag, small and lightweight, easy to carry. *Battery powered: The cable tracking tester is powered by 2 9V batteries (not included), with long standby time, low energy consumption, and can be used for a long time. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: ABS Size: As Shown Audios signal: 1.5kHZ Receiving frequency range: 100HZ-300kHZ Size: receiving end 238*43*26mm, transmitting end 145*35*25mm Batteries: 2 9V batteries (not included) Connector: RJ-11 (for telephones cable socket) Package List: 1 set x Cable Tracking Device