This item is in excellent working condition and barely used.
From Daredevil:

The Drive – Bi is a dual channel, op-amp gain circuit. Designed to cover medium to high level amp style drive that is extremely dynamic and raw.

• Low channel adds grit, sustain, and overdrive to your amp while still pushing output.
• Hi gain mode expands low end, saturation, and output compression for huge warm tones.
• This is one of the most natural sounding gain pedals on the market. Great for solo boosts as well.
• VOLUME – Controls effect output
• GAIN – Amount of circuit drive
• HI / LOW – Selects between both channels of gain
• True bypass, runs on 9V battery or DC supply

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