The Ebtech SWIZZ-CT cable tester is an intelligent cable tester for use with 3-pin XLR, mono and TRS 1/4", mono and TRS 1/8", TT, RCA, and MIDI connectors. Supported test modes include continuity, intermittent (with delay), phantom power, grounded shield detect, and multiple test tones. Power is supplied by two (2) AA alkaline cells (not included).