Features: 1.The pickup of the ukulele has a tuner and equalizer system to facilitate you to adjust the appropriate volume. 2.This ukulele pickup has a 2-band equalizer for treble and bass to meet your different needs. 3.The 2-band pickup can be applied to ukulele classical guitar parts to meet different musical requirements. 4.Precise craftsmanship and materials help restore high?fidelity sound quality and make the sound even. 5.The pickup has a wide amplification range and quick response, allowing you to indulge in the beautiful world of music. specification:Item Type: 2?Band EQ Pickup Function: 2-Segment EQ with color LED tuner Input Impedance: 22 M Frequency Response: 20HZ-20KHz Material: plastic Size: Length x Width : Approx. 56 x 40mm / 2.2 x 1.6in (error 5mm) Battery: 2 CR2032 Button Batteries (not included) Control Range: Bass: 12dB at 100Hz Treble: 12dB at 10KHz PackageList:1 x Pickup 4 x Screw 2 x Nut 1 xWasher 1 xPickup Strip 1 x Buckle