Cherub G-Tone GT-6 Acoustic Guitar Preamp Piezo Pickup 3-Band EQ Equalizer LCD Tuner with Reverb/Delay/Chorus/Wide Effects GT-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 not included) Specifications: Features: 3 Band EQ/ Chromatic tuner/ Phase/ Reverb&Delay&Chrous&Wide Effects Input Impedance:10MΩ 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 Power Supply: 9V Alkaline Battery (not included) Pick-up: Piezo ceramic pick-up Output Jack: 6.35mm Dimension: 5.2 * 5.4cm / 2.05 * 2.13in(W * L) Item Weight: 108g / 3.81oz Package Size: 15.2 * 8.2 * 4.3cm / 5.99 * 3.23 * 1.69in (L * W * H) Package Weight: 185g / 6.5oz Package List: 1 * 3-Band EQ Equalizer 1 * Battery box 1 * Piezo pickup line 2 * Cut-out template 8 * Mounting screws 1 * User Manual (English & Chinese)