This unit is in great shape and fully functional. I've moved to software based compression, so you can grab one at a great price. Features -Error proof operation to smooth uneven levels, add sustain to guitars, fatten drums or tighten up mixes -New gate timing algorithms ensure the smoothest release characteristics -Program-adaptive expander/gates -Great sounding dynamics control for any type of program material -Separate precision LED displays for gain reduction, compression threshold and gate threshold allow quick, accurate setup -Stereo or dual-mono operation -Balanced inputs and outputs on 1/4" TRS and XLR connectors -Side Chain insert -Classic dbx® "Auto" mode