Your excellent helper in cable test!

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1:  INTRODUCTION

The  4  in  1  Cable Tester  tests  4  common  LAN  and  Computer 
cables.  It  tests  installed  cables  or  patch  cords  with  RJ-45,
RJ-11,USB  ,and  BNC  connectors.  It  is  intended  to  test 
cables  with  straight  through  connections  not  cables  with 
reversed or transposed connections like some LAN crossover 
cables or  reverse wired  telephone cables.

2: SAFETY RULES & WARNINGS

WARNING

This tester is not intended for live circuits . 
Attaching this tester to a powered circuit will result in 
damage to the tester or injury to the user.

2.1 Read all instructions in this manual before using this tester. 
Failure may result in damage to the tester or injury to the user.

2.2  Repairs and maintenance must only be carried out by 
qualified service personnel or qualified electricians/technicians 
who know the  dangers of , and the safety rules applicable to 
this type of equipment.                                                                  

2.3 Do not touch the ends of the cables when operate it.
An unexpected dangerous potential may be present.

2.4 Do not apply voltage or current to any of the tester s 
connectors.