Klein Tools may be a new name in Test and Measurement, but they are legendary in quality and performance. They have entered the Test and Measurement with quite a splash and are continuing that trend with the Klein Tools VDV501-815 TDR Ranger Kit. This multi-function tester is a powerhouse that can handle TDR, Cable Length Measurement, Fault Finding and Cable Management. The TDR accurately (+/- 1%) measures cable length up to 3000ft using the TDR Spread Spectrum Technology. You can also check for faults and determine if a cable run is broken or damaged.