Feature: 1. This 4‑band equalizer pickup is suitable for classical folk guitars. 2. The preamp pickup has bass, midrange, treble and status control knobs. 3. This equalizer acoustic guitar pickup has a built-in tuner with LED display. 4. The SE-4N pickup comes with 6.35mm and XLR output jacks for connecting speakers. 5. This guitar is powered by a 9V battery and has a low battery indicator (not included). Specification: Item Type: EQ Equalizer PickupMaterial: Metal + plastic Model: SE-4N Battery: 9V battery (not included) Colour: Black Input Impedance: 10MΩ Frequency Response: 20Hz-20KHz Control Range: Bass: (+/-) 12dB at 60Hz, Midrange: (+/-) 12dB at 650Hz Treble: (+/-) 12dB At 2.2KHz, Existence: (+/-) 12dB at 10KHz Output Jack: Approx. 6.35mm / 0.3in and XLR output jack. Package List: 1 x Pickup1 x Battery Case1 x Pickup Strip8 x Screw1 x Wire Fixed Plate1 x Tie