Pyle PHCT205 Network Cable Tester - UTP, FTP, BNC Coaxial, Telephone Continuity, Short Circuit, Open Connection and Test Leads Tests Shielded (FTP) & Unshielded (UTP) Cables - Tester Ports: Main RJ45 Master port (M), Loop-Back RJ45 Port (L), And Far-End Port Test RJ11, Telephone lines (TEL) And Coaxial Cable (BNC) Via Included Special Adaptors - Includes: RJ45 To BNC, RJ45 To Alligator Clip Adaptors Detect Open Circuits, Short-Circuits, And Mismatched Wiring - Single Chip Microprocessor Watchdog Software Ensures Reliable Operation LCD Display Gives Clear Results While Showing How Each Wire Matches Up - Requires 4 x AAA 1.5V Batteries (Included) Maximum Cable Length: UTP/FTP Twisted Cable &lt; 300m, BNC Coaxial Cable &lt; 500m, TEL Telephone Line &lt; 300m - Dimensions: 4.87'' x 2.62'' x 0.96''