Features:

• 100% new and high quality
• Suitable for acoustic guitar and classical folk guitar,chormatic tuner 4-bands equalizer preamp.
• With Volume, Bass, Midd, Treble, Presence control knobs
• Built-in tuner with LED display, digital procedding tuner system
• Automatic low Battery check LED
• L x W Size: Approx. 68 x 44 mm.
• Powered by 6F22 9V battery(not Include)
• With 6.35mm output jacks for connecting the speaker.
• Input impedance: 10MΩ
• Frequency Response: 20Hz-20KHz
• Control Range: Bass: (+/-)12dB at 60Hz, Middle: (+/-)12dB at 650Hz, Treble: (+/-)12dB at 2.2KHz, Presence: (+/-)12dB at 10KHz

Package Include:

• 1 x HSY-400D preamp 
• 1 x pickup piezo
• 8 x screws