Cable Sequence Calibration detects cable sequence, open circuits, short circuits, miswiring, and reverse connections in network cables. RJ45/RJ11 Cable Tracing locates RJ11 and RJ45 cables using the transmitter, allowing for easy and quick line identification without stripping wires. Telephone Line Status Detection identifies the working status of telephone lines (idle, ringing, off-hook) and distinguishes between TIP and RING lines. Cable Level and Polarity Detection utilizes the transmitter to detect the DC level or polarity of the line. Transmitter Low Voltage Indicator alerts users when the transmitter's battery voltage is lower than the operating voltage with a flashing "SCAN" indicator light. This versatile tool is designed for efficient cable management and troubleshooting. It provides essential features for detecting various cable issues, ensuring reliable connections, and maintaining optimal performance in network setups. Ideal for technicians and DIY enthusiasts, it simplifies the process of identifying and resolving cable-related problems. Color: Blue Material: ABS Package Contents: 1 * RJ-45 cable tester kit