Portable Preamp - For acoustic string instruments with piezo and magnetic pickups - Three selectable basic sounds: Flat, Modern and Vintage - Input limiters, polarity selector and notch filters - 3-Band EQ with semi-parametric center control - Balanced XLR DI Out - Tuner output - Operation with 9 V battery or 9 V DC power supply (not included, suitable power supply available under Art.409939) - Dimensions (W x H x D) 100mm x 55mm x 100mm