1、This ukulele pickup is easy to use, just plug it into your amplifier, bass amplifier or other recording equipment. 2、This pick-up equalizer system with 2 bands can be easily fitted into your ukulele and it is essential to electrify and amplify their sound. 3、This pickup has a volume control knob and battery indicator, which is very easy to install and use. 4、This ukulele pickup is not affected by sound reflections from nearby objects, and can eliminate external sound interference as possible. 5、This pickup assembly is very complete, with piezoelectric ceramic pickup function, and a color tuner with LED, very easy to operate. 1 x Pickup1 x Battery Case1 x Pickup Strip8 x Screw1 x Tie1 x Buckle Item Type：Ukulele Pickup2-band equalizer with color LED tunerInput Impedance: 22MΩFrequency Response Range: 20hz-20khzSize: Approx. 45 x 43mm (error ±5mm) / 1.8 x 1.7in (error ± 0.2in)Power Supply: CR2032 x 2 (not included)