• Compressor pedal designed for bass.
• 3 Way attack selector switch.
• Vol and Sustain knobs.
• True bypass and durable build construction.
• 21dB max gain reduction.

Perfect for evening out your recordings, gigs or practice sessions. Very easy to use - the Volume control does as you'd expect, sustain defines the level of compression. The 3 way switch has 3 settings - Fast, Medium and Slow. This defines how much of your raw signal get through, going from little / none with Fast and quite a lot with Slow. Also works with electric guitar. 

Takes 9v battery / power (not included).