Pickup with 4 bands EQ, it is suitable for classical folk guitars. Bass, middle, treble and presence control knobs. Built-in tuner with LED display. With 6.35mm & XLR output jacks for connecting the speaker. Powered by one 9V battery and with low battery indicator (battery is not included). Pick-up: Piezo Ceramic Pick-up Input impedance: 10M Frequency Response: 20Hz-20KHz Control Range: Bass: (+/-)12dB at 60Hz, Middle: (+/-)12dB at 650Hz, Treble: (+/-)12dB at 2.2KHz, Presence: (+/-)12dB at 10KHz Output Jack: 6.35mm & XLR output jacks Model Number: SE-4N Type: Pickup Product Name: 4 Band acoustic guitar preamp for: Folk Guitar work by: 1 * 9V Battery (Not Included) colour:black Material:Plastic + electronics size:69.5*41.5mm Package Contents: 1 * pickup 1 * battery box 1 * pickup stick 1 * clip 1 * screw set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.