Electro-Harmonix The Silencer Guitar Noise Gate Pedal with Effects Loop Use it as an inline noise gate or to gate an entire effects loop Delivers up to -70dB of noise reduction, and features 8ms to 4 seconds of release time. Buffered bypass Compact design, rugged chassis. 9 volt battery included, and accepts a standard EHX 9.6DC/200 AC Adapter (optional).