Features: Chromatic tuner with LCD display for clear and intuitive viewing. 3 bands of equalization system: bass, middle, treble. You also can adjust the volume via the control knob. Powered by 2 CR2032 batteries(not included), with battery indicator light to tell you the battery working state. Wonderful accessory for ukulele lovers, always maintaining your ukulele in the best playing state. Specification: Condition: 100% Brand New Material: Plastic Color: Black Frequency Response: 20Hz - 20KHz Control Range: Bass: ±12dB at 100Hz Treble: ±12dB at 10KHz Battery Status: LED Power Supply: 2 * CR2032 Batteries(Not included) Battery Life: Over 200h(Only EQ), Over 100h(Tuner On) Main Body Size: Approx. 5 * 4 * 3cm / 2.0 * 1.6 * 1.2in Jack Part Size: Approx. 4 * 3.5 * 3.2cm / 1.6 * 1.4 * 1.3in Weight: Approx. 59g Packing List: 1 x Ukulele Pickup 1 x Jack Part 8 x Screws 1 x Piezo Pickup 1 x Sticker 1、Chromatic tuner with LCD display for clear and intuitive viewing. 2、3 bands of equalization system: bass, middle, treble. 3、You also can adjust the volume via the control knob. 4、Powered by 2 CR2032 batteries(not included), with battery indicator light to tell you the battery working state. 5、Wonderful accessory for ukulele lovers, always maintaining your ukulele in the best playing state.