2 Band Active Bass Guitar EQ Equalizer Preamp Circuit Pickup Black _x000D_ ,never used_x000D_ 1 Volume + 3 Tone pots with balance volume_x000D_ Balance volume for pickup_x000D_ Volume: Master_x000D_ Bass: +/-12dB at 85Hz_x000D_ Treble: +/-12dB at 7KHz_x000D_ material: ABS_x000D_ color: black To Fit Guitar: Package included: 1* pickup main part_x000D_ 4* potentiometer gasket_x000D_ 4* potentiometer nut_x000D_ 1* gasket_x000D_ 1* nut_x000D_ 1* battery box_x000D_ 2* screw_x000D_ Only the above package content, other products are not included._x000D_ Note: Light 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_