Guitar Pickups Prefix Plus-T Onboard Preamp Matrix Acoustic Pickup EQ Equalizer with Tuner Soft Piezo High-quality pickup system for acoustic guitar._x000D_ With Brillance, Bass, Contour and Treble control sliders, 250Hz-3kHz contour frequency._x000D_ Supports feedback-fighting notch filter and volume control, with phase switch._x000D_ Supports tuning function, with LED display showing the tuning information._x000D_ Ideal for acoustic guitar players to improve the guitar sound._x000D_ _x000D_ Control Range: _x000D_ Bass - 12dB_x000D_ Treble - 12dB_x000D_ Contour - 12dB_x000D_ Brillance - 9dB_x000D_ Power Supply:1 x 9V Battery (not included)_x000D_ Item Size:11x6.5cm/4.3x2.6in_x000D_ Item Weight:128g/4.5oz_x000D_ Note:Battery is not included_x000D_ Colour:Black_x000D_ Material:Plastic_x000D_ _x000D_ Package Contents:_x000D_ 1 * Guitar Pickup kit_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_