Effectively eliminate unwanted noise and hum without altering your tone. For guitarists who use instruments equipped with single-coil pickups, this is an ingenious problem-solver. It preserves the original attack and envelope while leaving your playing and dynamics intact. There are incorporated dedicated Threshold and Decay controls plus a Mute mode for tremendous flexibility. There is also an additional Send/Return loop for noise suppression of external effect units. Plus, an included status LED for effect On/Off and battery check, and you can run your NR100 on a 9 V battery or a DC power supply (not included). For absolutely noise-free operation, a first-class electronic On/Off switch is integrated.