Feature: 1. MULTIPLE FUNCTION: Analog acoustic preamplifier effect pedal with digital effects and loop function, with strong practicality. 2. EASY ADJUSTMENT: With reverb and chorus effects, each effect is controlled by only one knob, which is easy to adjust. 3. SIGNAL PROCESSING: Can optimize the preamp input according to guitar pickup type, and can set piezoelectric or magnetic to better process the signal. 4. 3 BAND EQ: With 3 band equalizer control (bass, middle and treble), and has 60 second loop, frequency response range is 20Hz‑20KHz. 5. WITH TOGGLE SWITCH: Notch filter toggle switch with precise adjustment control, with USB interface and XLR DI output. Specification: Item Type: Acoustic Preamp Effect Material: Metal Color: Yellow Sampling Rate: 44.1KHz Signal Processing Operation: 32Bit Frequency Response: 20Hz-20KHz ±1dB Dynamic Range: 120dB Maximum Input: +10dB Maximum Output: +10dB Product Power Supply: DC9V (not included) Normal Current: 180mA positive outside and negative inside EQ Control: High frequency ±10dB at 15kHz Intermediate frequency ±10dB at 1.8kHz Low frequency ±10dB at 80Hz. Package List: 1 x Effect1 x User Manual