JHS Pedals 3 Series Compressor Effects Pedal WhiteThe JHS Pedals 3 Series Compressor is a simple and powerful compressor that will give you everything from subtle tone smoothing to a super squashed sound. The Attack and Sustain knobs allow you to dial in the compression's overall feel and response to your playing, while the Volume knob enables you to set the overall volume at unity or boosted. Features A powerful compressor that will give you everything from subtle tone smoothing to a super squashed