Tests XLR, 1/4 in., 1/8 in., TT, RCA and MIDI connectors.

The intelligent, CPU-controlled CT100 accepts virtually any connector type:
XLR, mono and TRS phone (1/4 in., 1/8 in., TT), RCA and MIDI. It shows
which input pin is connected to which output pin. Separate LEDs indicate
proper shield connection and phantom power presence. The CT100 also
offers an installed cable test mode and a continuity check plus a test tone
generator.

Features
3 modes: cable test mode, installed cable test mode, and test tone mode
Accepts XLR, mono and stereo TRS phone (1/4 in., 1/8 in., TT),
RCA and MIDI Connectors
Continuity check
Intermittent detect
Phantom power detect
Grounded shield detect
Test tone generation (1 kHz and 440 Hz)
Battery operation (requires 2 AA alkaline batteries)