It's just an inexpensive rack nount tuner...
Where Obtained: Local Music Store
2 Input Jacks/2 Output Jacks one in front, one in back.
Mute button and override pedal.
Chromotic tuner, Tone Generator, Can be trained to another instrument.
Ac Power. Whish it had an LED segmented display instead of a single led dot to determine the note.
I have one in my acoustic rack and one in my studio rack. It's SLOW to find a note sometimes.
It is programmabble, but not usually used.
It's a tank, it's about 6 years old and I've had no isses.