* This LAN Network Cable Tester is required for network installation RJ-11, RJ-12, RJ-45, CAT5, CAT5e, 10/100BaseT, TIA-568A/568B, AT&T 258-A. * RJ45 Network Cable Tester tests double-twisted cables 1, 2, 3, 4, 5, 6, 7, 8 and Ground, 9 LED lights to indicate wiring connection on both remote and master unit. With this Network Cable Tester, you can judge wrong connection, short circuit and open circuit.* Compact and light weight Network Cable Tester, useful for home and outside use.* Host computer Size: 10.5x6.7x2.7(cm) / 4.13x2.64x1.06* Auxiliary machinery Size: 10.5x3.7x2.7(cm) / 4.13x1.46x1.06Features: * Quickly and easily check network cables and RJ11 cables * Check open and short terminals, straight through or crossover wiring type * Ideal for I.T enthusiast who wish to make their own network cables * Operates from a single 9V PP3 battery (not supplied) * LED for UTP Cable * Automatic scan for the wrong wiring or disorder cable * Test length depended on the battery condition * Note: due to air mail shipping restriction,battery can"t be included,battery will take off and not include.Package Contents: * 1 x Cable Tester * 1 x Carrying Bag * Note: battery not include