Ⅰ. Item Type: Cable Tester Material: Plastic Weight: Approx. 264g / 9.3oz Signal Frequency: 1.5khz Receiving Frequency Range: 100-300khz Receiver Battery: 6F22 9V (Battery Not Included) Transmitter Battery: 6F22 9V (Battery Not Included) Purpose: Cable Tracing Package List 1 x Receiver (Battery Not Included) 1 x Transmitter (Battery Not Included) 1 x User Manual 1 x Storage Bag Ⅱ. Cable Tester: Designed to identify and trace wires or cables in groups without damaging the insulation. Ⅲ. Function: Can help install, debug, maintain telephone lines, assess the continuity of cables or wires, trace cables or wires, and diagnose break points. Ⅳ. Line status solution: The cable detector detects the status of the working telephone line (not working, ringing, off). Ⅴ. Frequency: The frequency signal is 1.5 kHz, and the receiving frequency range is 100-300 kHz. Ⅵ. Material: Made of plastic, this cable tester is sturdy, durable, not easily damaged and has a long service life.