Behringer CT100 Professional 6-in-1 Instrument Cable Tester Microprocessor-controlled cable tester featuring 3 modes: cable and installed cable test plus test tone mode Accepts all standard connectors: XLR, TRS (1/4", 1/8", TT), RCA and MIDI Super-easy operation with intuitive LED display Continuity check and intermittent contact detection Phantom-power and ground-shield check