This tester is designed to handle twisted pair, straight, and Cat5/Cat5e/Cat6/UTP cables with RJ-11 or RJ-45 connectors to test for breaks or signal loss in your internet or LAN connection. Easy-to-read LED indicator lights to alert you to possible gaps in your signal transfer through each line

Features:

• Switch on the power on the main tester. 
• Remotely test cable up to 1000 ft in length (remote kit included) 
• Cable Tester for RJ11, RJ45, 10/100 Base-T and telephone cable ... etc
• It can easily clarify cable, continuity, open and short. 
• Verifying Cable continuity, open, short and cross wire pair up to 1000ft with the remote kit. 

Following are abnormal connections: 

• If one cable, for example, cable NO.3 is open circuited, the two NO.3 lights of the 
  main tester and remote tester will not turn on. 
• If several cables are not connected, several lights will not turn on respectively. If less than two cables are connected, none of the lights is on. 
• If two ends of a cable are disordered, for example, NO. 2and NO. 4, then displays on: If 
  two cables are short-circuited, neither of the corresponding lights is on of the 
  remote tester while the main tester remains unchanged.
• If three cables, including three, are short-circuited, none of the corresponding lights is on. 
• If test patch panels or wall plate outlets, two cables which can match each other 
  (RJ45) will be connected to the tester. 
• If test cables of the same axes, BNC turns on when the cable works. 
• Test of the RJ45 RJ11 Cat-5 Cat-6 cable: if all the cables work, the lights will become green from NO.1&2 to NO.7&8 sequently. if any light is not on or turns on unsequently, the cables are broken.