Tripp Lite Cable Tester Wire Tracker Tone Generator RJ45 RJ11 BNC w LED - Cable Signal Testing, Cable Tracing, LAN Cable Testing, Optical Power Testing, Short Circuit Testing, Open Circuit Testing, Wiremap, Coaxial Cable Testing, Network Testing - Network (RJ-45) - Twisted Pair, Optical Fiber, Coaxial - 2Number of Batteries Supported - 9V - Battery Included: