That's a CT100. It has that nice handy display that shows you what's connected to what.
The CT200 is a different kettle of fish. Microprocessor controlled, it scans the connections and tells you what's what.
More connection types than the CT100. CT100 does XLR, mono & stereo jacks, RCA phono, and MIDI. CT200 does the above, plus USB (type B only though), Speakon, 3.5mm mono/stereo jacks, and RJ45 ethernet cables. If you're testing jack-jack mono cables, it shows a ring to ground short, which is logical.