EBS is a Swedish manufacturer specialized in equipment for bass.
The WahOne is a fully analog wah and volume pedal with true or buffered bypass. It has a tube simulator, inverter filter, HiQ mode which increases the Q factor (intensity of reaction) - Bandpass bass to reinforce the bass frequencies; active or passive mode: it changes between different input impedance (for guitars / bass active).
Beautiful build quality and finish for this pedal. Usage is very simple despite numerous possible adjustments.
This wah is designed for bass, but it is extremely versatile and fits seamlessly with guitar. A wah that does everything. Also doubles has a volume pedal.
In good condition, in original box and user's manual.