Whether your cables are in Soho; New York; Los Angeles; or Timbuktu; the Monoprice LanSOHO 200 Cable Tester will be there to defend your network from faulty cables; or at least let you know when you have one. This multifunction tester is designed to work with RJ45 and BNC Coax cables. It can test for continuity; open or short circuits; crossed wires; or incorrectly wired split pairs. It can also generate a tone signal for identifying individual cables in bundles or finding the location of a cable break; when used with an Amplifier Probe not included . The tester is equipped to give proper test results for RJ45 cables wired for EIA/TIA568A; EIA/TIA568B AT T258A ; 10BASET; and Token Ring. The manual shows proper test results for each type of cable and gives examples of failure indications. Compact and easy to use; this cable tester is appropriate for everyone; from the home network DIYer to the IT professional. Order before midnight tonight and get a 9 volt alkaline battery; zippered nylon carrying case; metal belt clip; 6" BNC jumper cable; and 50ohm BNC terminator with each tester! Note that the instructions included with this device do not indicate how to enable Tone mode. To enable Tone mode; press and hold the Fault Check/Tone button for about 5 seconds; until the Tone light illuminates. You can then connect the RJ45 cable and check for the tone using a Probe; such as the ones included with PID 8132 and PID 8134 . WARNING!!! Do not test live circuits as it could cause damage to the tester unit or personal injury. Support Files: User s Manual Jul 21; 2011 Feature Card Jul 21; 2011