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-upInput impedance: 10MFrequency Response: 20Hz-20KHzControl Range: Bass: (+/-)12dB at 60Hz, Middle: (+/-)12dB at 650Hz, Treble: (+/-)12dB at 2.2KHz, Presence: (+/-)12dB at 10KHzOutput Jack: 6.35mm & XLR output jacksModel Number: SE-4NType: PickupProduct Name: 4 Band acoustic guitar preampfor: Folk Guitarwork by: 1 * 9V Battery (Not Included)colour:blackMaterial:Plastic + electronicssize:69.5*41.5mmPackage Contents:1 * pickup1 * battery box1 * pickup stick1 * clip1 * screw setOnly 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.