Thank you very much! This is the L.R. Baggs SESSION Acoustic DI! As an acoustic guitar preamp DI, it has a very simple set of knobs, and you can get a well-balanced, great sound just by plugging it in. There are no scratches, and I've confirmed that it works perfectly; it's in great shape! It's very simple and easy to use. When running on batteries, the ability to check the remaining 9V battery life with the push of a button is very reassuring. The gain knob also has an indicator, which is helpful for knowing how much to set it to. Just by turning up the saturator knob, the sound pressure increases, and the sound becomes more cohesive. It's a groundbreaking knob. I think you can use the phase switch differently depending on the song. Not only is it simple and easy to use, but it also has a good design, and I think it will become a companion that you'll enjoy taking with you. It's very clean, but please understand that it is a used item. I do not reserve items according to Mercari rules. To prevent swapping, no claims and no returns are accepted. In any case, the person who presses the purchase button will be given priority. I hope it reaches someone who needs it! ■ Acoustic Guitar Preamp/DI ■ Controls: Volume Gain Notch Saturator Comp EQ Phase Switch ■ Accessories: Dedicated case ■ Dimensions: Approximately 15.9 x 10.2 x 4.4 cm ■ Weight: Approximately 680g Thank you for looking. Type...Acoustic Guitar Preamp DI