This easy-to-use, competitively priced tester is three tools in one—a cable fault locator, a cable & wire manager and a tone generator with SmartTone™ technology. From just ONE END of any two or more conductor cable you can measure up to 3,000 feet (915 meters). The TS 100 cable fault locator lets you easily find the distance to opens or shorts on electrical wire, telephone wire, security wire and coax.