Acoustic Guitar Preamp Pick-up With Tuner Reverb Delay Chorus Wide Effects.    It-6 is a 3 Band EQ with built-in highly accurate chromatic tuner. It has phase, reverb, delay, chrous and wide effects. The compact size makes it easy to install into a guitar and the visible portion is only 52mm*54mm*4mm. Low battery message is displayed when the battery is getting low.    Features: Tone and volume control.  With phase and tuner function, built-in reverb, delay, chrous and wide effects.  3-band equalizer, rotate Low/Middle/High to adjust volume frequency.  Rotate Reverb/Delay/Chorous/Wide button to adjust its corresponding reverb, delay, chrous and wide effect.  Wide frequency range from 20 HZ to 20 kHZ.  LED for effect on/off and battery check, replace battery when BATT. light is on.  Powered by a 9V Alkaline battery.(Battery is included).    Specification: 3 Band EQ/ Chromatic tuner/ Phase/ Reverb&Delay&Chrous&Wide Effects;  Input impedance:10M;  Frequency Response:20Hz~20 KHz;  Control Range: Low:+/-12dB at 100Hz       Middle: +/-12dB at 800Hz         High: +/-12dB at 3KHz;  Low battery check LED;  Battery life:over 20hours;  Power supply:9V Alkaline Battery;  Pick-up:Piezo ceramic pick-up;  Output Jack:6.35mm;  Power:9V Alkaline Battery(Included);  Dimension:52(W)x54(L)mm;    Package Included: 1x 3-Band EQ Equalizer;  1x Battery box;  1x Piezo pickup line;  2x Cut-out template;  8x Mounting screws;  1x User Manual (English & Chinese)