1、Cable Tester: Designed to identify and track wires or cables in groups without damaging the insulation. 2、Function: Can help install, debug, maintain telephone lines, judge the continuity of cables or wires, trace cables or wires, and diagnose breakpoints. 3、Line Status Judgment: The cable detector determines the state in the working telephone line (idle, ringing, off hook). 4、Frequency: The frequency signal is 5kHz, and the receiving frequency range is 100‑300kHZ. 5、Premium Material: Made of plastic, this cable tester is sturdy, durable, not easily damaged, and has a long service life. 1 x Receiver (battery Not Included)1 x Transmitter(battery Not Included)1 x User Manual1 x Storage Bag Item Type: Cable TesterMaterial: PlasticWeight: Approx. 264g / 9.3ozFrequency Signal: 1.5khzReceiving Frequency Range: 100-300khzReceiver Battery: 6F22 9V (battery Not Included)Transmitter Battery: 6F22 9V (battery Not Included)Purpose: Cable Tracing