Pyle Meters PHCT70 Network Cable Tester Test Unshielded (UTP) and STP Cables Via RJ45 Port - Display Values: Meters or Feet - Calibration Accuracy: 3% (1.5 ft)(Calibrating Cable &gt; 5M) Test RJ11, Telephone Lines, Coaxial Cable (BNC) via Special Adaptors - Locate Up To 8 Far-End Passive Ports - Requires 4 x 'AA' 1.5V Batteries Detect Open Circuits, Short-Circuits, Cross-Talk Interference and Mismatched Wiring - Voice Prompting - Maximum Cable Length: Twisted Cable 31,200 ft Determine Length of Each Strand In Pair/Length Mode with 97% Accuracy - Measure Length and Recognize Pairs Without Far-End Port LCD Display - Single Chip Microprocessor Watchdog Software Ensures Reliable Operation - Shipment Accuracy: 5% (1.5 ft)(AMP, AT&T Class 5 Cable)