SB-3 features a pre-wired balance control and master volume and
treble on separate potentiometers with the bass on SMT PCB. Each
control pots are designed to connect to PCB direct mount, which
make SB-3 installation easier and versatile. Additional wiring you
may need for SB-3 installation is just Pickup, Output Jack, Ground
and Battery cable. High Impedance Input design can match with
any Active or Passive Pickup and also Low Impedance Output will
keep the same tone from your guitar to any PA system without
losing high frequency response. Using advanced Surface Mounted
Techniques could reduce unwanted sound (Noise) while increasing
sound quality.

Features :
SIZE: 25mm*30mm
5 individual pots: Balance, Middle Frequency, Treble, Volume, Bass
Including a battery clip

Technical Specifications :
Bass: +/-12 dB at 80 Hz
Middle: +/-12 dB at 800 Hz
Treble: +/-12 dB at 4 kHz
Balance: MN500K Potentiometer
Current: 0.32 mA
Voltage range: 6 ~ 22 Volt
Battery: 9 V Alkaline
About 1,000~2,000 hours (9 V Alkaline) - workable voltage: drop
down to 6 Volt
Application: Electric Guitars & Basses, Piezo pickup equipped
instruments.