AIHOME Multipurpose CAT5 RJ45 Network Cable Tester Meter Length Network Equipment Network Tester Lan CABLE TESTER Find wire on all types of connected operating Ethernet switch/ Router/ PC terminal; Rapidly find the target wire from among plenty of telephone wires; Rapidly find the target wire from among plenty of network wires; It can take place of cable tester; Compare the volume of the tout sound and the brightness of the signal indicator. Then you can find the target wire which has the highest volume and brightest indicator