The MXR Bass Compressor boasts a complete array of controls—Attack, Release, Ratio, Input, and Output—that allow you to easily fine-tune your sound, from subtle peak limiting to hard squashed compression effects. With exceptional transparency, this allows your full dynamic range to shine through until your signal reaches the compression threshold, indicated by the ten highly visible gain-reduction status LEDs. CHT Constant Headroom Technology gives you all the headroom you need for a clear performance. It's all packed into a durable, lightweight aluminum-housing pedal that's the size of a Phase 90.