Crank up your rig to extremes without fear of any hiss or excess noise. The Noise Clamp reduces the noise level (up to 26 dB) within the effect loop and from guitar to amp simultaneously. A single trigger knob allows you to set the volume threshold at which the pedal is active and a green LED indicates gate on/off. Buffered bypass. Powered by 9 volt battery or AC adaptor (ECB003).