Description: 【Convenient Control】: Ukulele piezo pickup with preamp, is equipped with a volume control knob and battery indicator for easy adjustment and monitor during performances 【3 Band EQ Equalizer】: The ukulele pickup preamp tuner system features a 3 band equalizer (bass, middle, treble) to adjust your ukulele’s tone for different musical styles and environments 【LCD Display】: The guitar pickup is built in chromatic tuner with LCD display screen, allowing for precise tuning and effortless volume checking at a glance 【Easy to Install】: The pre wired ukulele piezo pickup ensures simple assembly and easy installation, making it user friendly for quick setup on your ukulele 【Musical Instrument Accessories】: The ukulele pickup system with a unique pivot mechanism enables fast installation of 2 batteries (battery not included) Specification: Material: ABS Plastic Input Impedance: 22 MΩ Frequency Response: 20Hz-20kHz Control Range: Bass: ± 12 dB at 100Hz Midrange: ± 12 dB at 300Hz Treble: ± 12 dB at 10kHz Size Chart: Package Size: 10cmx7cmx4cm/3.94inchx2.76inchx1.57inch Package Includes: 1 Set Ukulele Piezo Pickup Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.