When you are going to maintain your computer or laptop， this Network LAN Cable Tester RJ45 RJ11 RJ12 Cat5 and Crimper will help you a lot. Made of high-quality material， this network crimper can work well. In addition， this high –technology cable tester can provide you precise data. What&acute;s more， it is easy to use. With this network crimper and cable tester， you are able to maintain your computer quickly and well. You cannot miss it.                                    Features            Cable Crimper: <br>It is a portable tool.Portable style with perfect shape.It won&acute;t damage the shelled-wire and work convieniently with high efficiency.The mouth of the press-pliers is made of magnanic steel， which ius hard and durable.While using press-pliers， just insert the modular plug into its position and press it.Suitable for Cat5 and Cat5e cable with 8P8C plugs<br>Cable Tester: <br>Test RJ45 and RJ11 network cablesTest correspondingly double-twisted cables 1， 2， 3， 4， 5， 6， 7， 8 and Ground.Auto scanning mode for quickly testing.9 LEDs to indicate which wire whether open or not on both remote and master unit.Provided grounding test.Can judge wrong connection， short circuit and open circuit.Put cables into both main tester and remote tester.The lights of the main tester will turn on sequently from 1 to G.Detachable remote tester， test remote cable up to 1000ft. in length.Power Supply by DC 9V reduplicated battery( not included )Power switch for saving battery power.                                                            Specifications            Dimensions    10.3 x 10.1 x 2.7 cm / 4.06" x 3.98" x 1.06" (L x W x H)    <br>Power supply    DC 9V Battery    <br>Weight    372 g / 14.4 oz    <br>Color    Green    <br>                                                            Package Includes            1 x Network Crimper1 x Cable Tester