Features: This tester is a simple, yet powerful, tool that helps troubleshoot network and telephone cables for broken wires and crossed connections. The tester consists of a main Master unit and a detachable Remote unit, each of which have an RJ11 and an RJ45 jack. The unit is powered with a 9-volt battery (not included) and can be stored in the included, zippered, synthetic leather case. The master and remote unit each have a series of 9 LED's that show the status of each line on the attached cable. The tester supports both a fast automatic and a slow automatic mode. Streamline shape, ergonomic design. Anti-fall, anti-light, conform to site construction. Specification: Condition:100% Brand New Material: Plastic Color: As shown in the picture Size: Approx. 105x105x26mm / 4.1x4.1x1.0in Weight: Approx.200g/7.1oz Test Cable: RJ45/RJ12/RJ11 Power: DC 9V laminated battery (Not included) Power Consumption: 25MA Test Method: 1. For twisted pair 1, 2, 3, 4, 5, 6, 7, 8, G, one by one (pair) test, can determine which one (pair) wrong line, short circuit and open circuit. 2. Switch "OFF" to close, "ON" to normal test speed and "S" to slow test speed. 3. Twisted-pair test: turn on the power and plug the network cable plug into the main tester and the remote tester respectively. The host indicator lights will flash sequencer by sequencer from 1 to G. 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 -- -- -- -- -- -- -- -- -- - (RJ11) If the connection is abnormal, it will be shown as follows: a. When a network cable, such as line 3, is broken, the lamp of the main tester and the lamp of the remote test end no. 3 will not work. b. When several lines are not connected, several lines are not bright; when fewer than 2 lines are connected, the lights are not bright. c. When the two ends of the network are out of order, examples 2 and 4 are out of order, as shown below: The main tester remains unchanged: 1-2-3-4-5-6-7-8-g The remote test terminal is: 1-4-3-2-5-6-7-8-g d. When there are 2 short circuits in the network wire, the display of the main tester will not be bright, and the two line lights showing short circuits in the remote test terminal will be slightly bright. If there are more than 3 (including 3), the lights of all short circuits will not be bright. Package List: 1 x Cable Tester (Generator Receiver) 1 x Storage Bag