This is for a Behringer Autocom Pro XL 2-channel Expander/Compressor/Limiter. There are signs of cosmetic wear from racking a few different times, but nothing that affects function. I have another of the same unit with rack ear damage listed for cheaper as well.
From Sweetwater's page about this unit:
Looking for a multi-tool for stage and studio? The Behringer MDX1600 Autocom Pro-XL Compressor is a dual-channel compressor/limiter/expander ready to take on your biggest challenges. The expander increases signal presence and energy, while the compressor minimizes peaks without loss of high frequencies. The switchable Interactive Knee Adaptation (IKA) in the MDX1600 combines the advantages of hard and soft-knee compressors. You can combine both channels for stereo operation, and also turn on the side chain input for monitoring.