Pickup with 4-band EQ, suitable for classical and folk guitars. Bass, middle, treble, and presence control knobs. Built-in tuner with LED display. Equipped with 6.35mm and XLR output jacks for connecting to external speakers or amplifiers. Powered by one 9V battery (not included) with low battery indicator. Pickup type: Piezo Ceramic Input impedance: 10MΩ Frequency response: 20Hz–20kHz Control range: Bass: ±12dB at 60Hz, Middle: ±12dB at 650Hz, Treble: ±12dB at 2.2kHz, Presence: ±12dB at 10kHz Output: 6.35mm and XLR jacks Model number: SE-4N Type: Pickup Product name: 4-Band Acoustic Guitar Preamp Designed for: Folk Guitar Power source: 1 x 9V battery (not included) Color: Black Material: Plastic and electronic components Dimensions: 69.5 x 41.5mm Package contents: 1 x Pickup 1 x Battery box 1 x Pickup stick 1 x Clip 1 x Screw set Note: Light reflection and differences in display screens may cause slight variations between the color shown in the photo and the actual product. Measurement may vary by +/- 1-3cm.