Features: Cherub GT-6 is a 3 Band equalize 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. 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 6F22 9V Alkaline battery.(Battery is not included) 3 Band EQ/ Chromatic tuner/ Phase/ Reverb&Delay&Chrous&Wide Effects Input Impedance:10M Frequency Response: 20Hz-20KHz Control Range: Low: +/-12dB at 100Hz Middle: +/-12dB at 800Hz High: +/-12dB at 3KHz Low Battery Check: LED Battery Life: Over 20hours Pick-up: Piezo ceramic pick-up Output Jack: 6.35mm Dimension: 5.2 * 5.4cm / 2.05 * 2.13in(W * L) Package Include: 1 set of Cherub GT-6 3-band equalizer preamp 8 * Screws