I'm selling this because I no longer need it, after using it for about a year. Since it was used on an effects board, I think it's in pretty good condition. Also, I have kept the original instruction manual and box, so the items in the fourth photo are included. Here are the specifications: ■ Guitar Effect Pedal ■ Compressor ■ All-analog signal path ■ Transparent sound (doesn't lose the original tone) ■ 3 compression ratios (2:1, 4:1, 10:1) ■ Attack & Release control ■ Mix control for blending the original sound ■ "Tilt" style tone control centered at 500Hz ■ TRS 3.5mm insert for sidechain ■ Equipped with a high-pass filter for sidechain ■ Multi-LED meter to monitor gain reduction/input level/both ■ True bypass ■ Power: DC9V center-negative power adapter (sold separately)