Active preamp with effects for ukulele Flexible piezoelectric pickupInput impedance:> 2M ΩIncludes reverb, delay, and chorus effectsThe DSP chip makes the sound more powerful, rich, and dynamicGood sound, sensitivity, and low noise level.Frequency range: 20 Hz ~ 20 KHz3.7 V lithium polymer battery (1800 mAh approx. 20 hours)1/4'' Endpin output jackCharging current: 5V/0.4A (around 4-5 hours)