CAT SL1 Ultimate
The SL1 Ultimate is a two-piece preamp -- main chassis and separate power supply -- with an attached umbilical connecting things.
It is in fairly good condition, I say failry because there are some writings in the front panel that faded away as you can see in the pictures, otherwise I would say pretty good condition. Functionally it's flawless.
You can find tons of reviews about this product, CAT is specialized in such pre-amplifier and through the different revisions they got to the Ultimate version, for sure a refined evolution.