Behringer FM600 Filter Machine Ultimate Filter Modeling Effects Pedal The ultimate Filter Modeler that delivers the whole history from funky auto-wah, twin, band-pass to swirling low-pass filter effectsat the touch of a footswitch Real Sound Modeling (RSM) combines state-of-the-art DSP technology with sophisticated algorithms to emulate real acoustic environments Discover the world of moving filters and take off with sounds you have never heard before Dedicated Peak, Range, Sensitivity, Filter and Polarity controls for awesome sound shaping Blue status LED for effect on/off and battery check