4PCS Panasonic LR03BCH Alkaline AAA Batteries

– Multi-function LAN Tester, Wire Tracker, RJ11 RJ45 Line Finder, Network Cable Tester for LAN Ethernet Cable Collation.
– High sensitivity and strong anti-jamming ability for identifying the target wire among bunch of wires.
– Has an illumination light on the top for working in dark locations.
– With a speaker volume that can be adjusted.
– Also comes with a 3.5mm jack earphones.
– Cable break point can be found easily by tracing the cable with receiver and connecting other end with emitter. Sound will change where cable is broken.
– Can be used to trace cables that include telephone wires (RJ-11), computer network cable (RJ-45).
– Includes: 1x Emitter with double RJ11 RJ45 interface, 1x Receiver with BNC interface, 1x Pair of Earphone, 1x RJ11 Clip Adapter Cable, 1x RJ45 Cable, 1x Storage case, 2x 9V batteries, 1x English User Manual.