MXR M135 Smart Gate Pedal Features at a Glance: Noise gate pedal for electric guitar or bass Intelligent gating means the gate reacts slowly when you're holding sustained notes, and faster when your playing speeds up Variable threshold lets you control how much gating is taking place Three operation modes: Hiss for high-frequency noise, Mid for noisy guitar amps, and Full for wide-range signals and bass rigs Built to last