Features: Cherub GT-6 is a 3-band equalizer with built-in highly accurate chromatic tuner. It features phase, reverb, delay, chorus, and wide effects. The compact size makes it easy to install into a guitar, with the visible portion measuring only 52mm * 54mm * 4mm. A low battery indicator is displayed when the battery is running low. Includes phase and tuner functions, with built-in reverb, delay, chorus, and wide effects. 3-band equalizer: adjust volume frequency using Low/Middle/High controls. Adjust reverb, delay, chorus, and wide effects using dedicated knobs. Wide frequency range from 20 Hz to 20 kHz. LED indicators for effect on/off and battery status; replace battery when the BATT light is on. Powered by a 6F22 9V alkaline battery (battery not included). Features: 3-band EQ, chromatic tuner, phase, reverb, delay, chorus, and wide effects. Input Impedance: 10M Frequency Response: 20Hz20kHz Control Range: Low: +/-12dB at 100Hz, Middle: +/-12dB at 800Hz, High: +/-12dB at 3kHz Low Battery Check: LED indicator Battery Life: Over 20 hours Pickup: Piezo ceramic pickup Output Jack: 6.35mm Dimensions: 5.2 * 5.4cm / 2.05 * 2.13in (W * L) Package Includes: 1 set of Cherub GT-6 3-band equalizer preamp 8 screws