Sperry Instruments TT64202 Cable Test Plus, Coax & UTP/STP Cable Tester - Detects: Shorts / Miss-wires & Reversals, Wiring Reference Chart Included, 2 Pc. Kit, Yellow & Black N/A Imported Tests coaxial cable as well as Category 3 - 6 patch cords and installed, in wall cables for proper wiring Detects opens, shorts, miss-wires, reversals and shield continuity Use by connecting the 2 halves with the cable needing testing Included jumpers allow testing of installed, in-wall cables Easy-to-read LED pinpoints the exact error