Presonus EQ3B Parametric Equalizer Includes AC adapter This is a 3-band parametric equalizer from Presonus. It has balanced output via XLR connectors, and I used it for shaping the sound of my acoustic guitar. Power-on operation has been confirmed. There are scratches on the back (see image 5), and Velcro is attached. The included items are all shown in the images. The item will be shipped with bubble wrap directly around the box. Please refrain from purchasing if you do not understand that this is a used item.