Features: 100% brand new and high quality. 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 remote kit. Specifications: Main tester: 1-2-3-4-5-6-7-8-G Remote tester: 1-2-3-4-5-6-7-8-G ----RJ45 1-2-3-4-5-6 ------------RJ12 2-3-4-5------------------RJ11 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 is 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 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. Requires one 9-volt battery (not included) 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. Power: 9V battery ( Not Included ) Color: White & green Size: approx. 105*102*27mm(L*W*H) Net weight: 113g Package included: 1 x Network Cable Tester 1 x black bag for tester