BOSS NS-2 Noise Suppressor Pedal.
The NS-2 Noise Suppressor eliminates unwanted noise and hum without altering an instrument's natural tone. It's the perfect pedal to quiet down any pedalboard or effects setup.
• Compact noise suppression pedal for eliminating noise and hum in guitar and bass effects and amplifier setups
• Unique noise detection circuit preserves the natural attack and envelope of an instrument's sound
• Threshold and Decay knobs allow for shaping the elimination/suppression as desired