SA-AVT is Volume & Tone booster for Piezo pickup.
It's made up of two potentiometers without case.
It is easily mounted on the side of your guitar.
SA-AVT will provides virtually noiseless sound
without shielding case.
The tone controls to boost the resonance to
achieve pure natural acoustic sound
while other ordinary tone controls to reduce
the treble band range.
Using advanced Surface Mount Techniques
could reduce unwanted sound (Noise)
while increasing sound quality and it's reliability.

Features :
Battery Req. : DC9V
Current : 80microamps at 9V
Active Voltage Range : ~2.5V
Input Jack : 2.5mm
Output Jack : 6.3mm
Volume(with power switch) + 1 tone
Dimension : W 42 X H 24 X D 26 (mm)