Features Line Finding Function: Insert the network cable with registered jack into the RJ11 RJ45 interface of the transmitter, lightly press the SCAN button of the transmitter to start the line finding function. When you hear a beep sound, it indicates that the target cable has been found. Alignment Function: Press the TEST button on the transmitter lightly to activate the alignment function. Determine the characteristics of circuit paths, short circuits, open circuits, and crossings based on the wire sequence indicator light on the transmitter and receiver. Indicator Light: Insert the RJ11 crocodile clip adapter wire into the RJ11 interface of the transmitter, and use red and black clips to clamp the two ends of the tested line. The wire sequence 1 indicator is on, the red crocodile clip is the negative pole, the wire sequence 3 indicator is on, the red crocodile clip is the positive pole. Convenient to Use: Suitable for RJ45 network cable interface, RJ11 telephone cable interface, dual cores telephone cable can be connected through crocodile clip. Split design, easy to operate, supports long distance line finding and alignment at both ends. Multiple Functions: Supports sensitivity adjustment from 0 to 5cm distance, flashlight for receiver lighting, output signal level of about 5Vp‑p, with long transmissing distance, and low signal interference. Specification: Item Type: Cable Tracer Material: ABS Adjustable Sensitivity: Approx. 0-5cm / 0-2in Distance Flashlight: Receiver Lighting Display: LED Indicator Output Signal Level: About 5Vp-p Maximum Working Current: Transmitter about ≤60mA; Receiver about ≤80mA Signal Transmissing Distance: Approx. ≤3km Battery: 2 x 6F22 9V Battery (not included) How to Use: Open the package to use. packing list: 1 x Transmitter 1 x Receiver 1 x Crocodile Clip 1 x Ethernet Cable 1 x Storage Bag 1 x User Manual Package List 1 x Transmitter 1 x Receiver 1 x Crocodile Clip 1 x Ethernet Cable 1 x Storage Bag 1 x User Manual