The JHS Effect Pedals - 3 Series Compressor is a simple to use compressor unit made in Kansas City. Straightforward controls offer subtle dynamics smoothing to total squashed tone. The Attach and Sustain help adjust the feel of the compression, while the Bright switch helps you stand outa in the mix. Requiring the industry standard 9v, center negative power, this new offering from JHS is priced perfectly for a beginner and carries professional quality tone.