ByteBrothers CTX200 Pocket CAT RJ45/COAX TESTER/TONER WITHOUT PROBE. The perfect testers for any toolbox. Performs a TIA568 test on CAT5/6 network cable (RJ45) with instant PASS/FAIL results. Ruggedized and cushioned for toolbox use with a hidden drawer for remote storage. Includes a tone generator. Available with or without a filtered, lighted inductive tone probe. Coax remote also included. Ruggedized for field use.