The cable finder is used to locate, track and test telephone lines and network cables. Range: up to 3m. 4 functions: a) cable tester makes it easy to find lines in walls. b) current tester for short circuits or cable breaks. c) Telephone Line Tester check analog telephone lines. d) Finding and checking LAN cables. 1. Connect the transmitter and the cable to be found with the alligator clip. 2. Slide the transmitter switch to the SCAN position. 3. Press the button on the receiver and use the probe to find the object cable - the loudest BEEP shows the cable to be found. Has a bright red light and external earphones to be able to work in dark and noisy environments. Contents: 1x cable tracer, 1x cable with crocodile clip, 1x RJ45 network cable, RJ11 telephone cable, 2x 9V batteries, 1x headphones.